CN105071666B - A kind of high-precision signal source board - Google Patents
A kind of high-precision signal source board Download PDFInfo
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- CN105071666B CN105071666B CN201510475633.2A CN201510475633A CN105071666B CN 105071666 B CN105071666 B CN 105071666B CN 201510475633 A CN201510475633 A CN 201510475633A CN 105071666 B CN105071666 B CN 105071666B
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Abstract
The present invention discloses a kind of high-precision signal source board, including power module, signal generating circuit, the first filter amplification circuit, the second filter amplification circuit and leading-out terminal.The power module connects alternating current.The signal generating circuit input terminal connects power module, and output end connects the first filter amplification circuit input terminal, the second filter amplification circuit input terminal.The first filter amplification circuit output end, the second filter amplification circuit output end are electrically connected leading-out terminal.The present invention uses high-precision reference voltage source for core devices, keeps circuit more flexible；Operational amplifier is added, signal jitter is reduced；Upgrading is convenient, at low cost, and power module directly connects alternating current, is not necessarily to additional power supply, and application is more extensive.Precision of the present invention is high, and stability is good, and temperature drift is small, and circuit structure is simple, agrees with the development need of integrated circuit.
Description
Technical field
The present invention relates to technical field of integrated circuits more particularly to a kind of high-precision signal source boards.
Background technology
Integrated circuit (IC) is a kind of microelectronic device or component, using certain technique, needed for a circuit
The elements such as transistor, resistance, capacitance and inductance and wiring interconnection together, are produced on a fritter or a few fritter semiconductor wafers or Jie
On matter substrate, it is then encapsulated in a shell, becomes the microstructure with required circuit function.But with IC technologies
Innovation, conventional power source signal plate is following insufficient due to existing：Precision is low, and signal stabilization floats greatly with steady, needs additional power supply,
Circuit structure is complicated, of high cost, and can not upgrade, and application range is small, cannot be satisfied the development need of integrated circuit.
Invention content
It is an object of the invention to by a kind of high-precision signal source board, mention solving background section above
Problem.
For this purpose, the present invention uses following technical scheme：
A kind of high-precision signal source board comprising power module, signal generating circuit, the first filter amplification circuit,
Two filter amplification circuits and leading-out terminal；The power module connects alternating current；The signal generating circuit input terminal connects power supply
Module, output end connect the first filter amplification circuit input terminal, the second filter amplification circuit input terminal；First filter and amplification
Circuit output end, the second filter amplification circuit output end are electrically connected leading-out terminal；Wherein, the signal generating circuit includes voltage
Translation circuit, rectification circuit and voltage stabilizing source circuit, voltage conversion circuit, rectification circuit and voltage stabilizing source circuit are sequentially connected electrically, electricity
The input terminal of translation circuit is pressed to connect power module；First filter amplification circuit includes the first reference voltage source circuit and the
One filter circuit, the first reference voltage source circuit and the first filter circuit are connected in series with, the input of the first reference voltage source circuit
The output end of end connection voltage stabilizing source circuit, the output end of the first filter circuit connect leading-out terminal；The second filter and amplification electricity
Road includes the second reference voltage source circuit and the second filter circuit, and the second reference voltage source circuit and the series connection of the second filter circuit connect
It connects, the output end of the input terminal connection voltage stabilizing source circuit of the second reference voltage source circuit, the output end connection of the second filter circuit
Leading-out terminal.
Particularly, first filter circuit includes the capacitor filter being sequentially connected in series, first-order filtering circuit, two
Rank filter circuit and high-frequency filter circuit.
Particularly, second filter circuit includes the capacitor filter being sequentially connected in series, first-order filtering circuit, two
Rank filter circuit and high-frequency filter circuit.
Particularly, the signal generating circuit includes power end J1, capacitance C1, transformer T1, capacitance C2, capacitance C3, becomes
Depressor T2, bridge rectifier, electrolytic capacitor C32, the electricity being made of diode D1, diode D2, diode D3, diode D4
Solve capacitance C33, capacitance C7, capacitance C8, electrolytic capacitor C34, electrolytic capacitor C35, source of stable pressure U3, source of stable pressure U4, electrolytic capacitor
C36, electrolytic capacitor C37, capacitance C9, capacitance C10, electrolytic capacitor C38, electrolytic capacitor C39, positive voltage signal output end, negative electricity
Press signal output end；Wherein, capacitance C1 is attempted by between power end J1 and transformer T1；After capacitance C2, capacitance C3 series connection and connect
Between transformer T1 and the primary coil both ends of transformer T2, the contact after capacitance C2 is connected in series with capacitance C3 connect power supply
Hold J1；Transformer T2 secondary coils lead to the first to three terminals, and bridge rectifier leads to first to terminals；Transformation
Device T2 secondary coils draw the first terminals, the second terminals be separately connected bridge rectifier extraction the first terminals,
Third terminals；The third terminals connection electrolytic capacitor C32 that transformer T2 secondary coils are drawn, capacitance C33, capacitance C7,
Capacitance C8, electrolytic capacitor C34, electrolytic capacitor C35, electrolytic capacitor C36, electrolytic capacitor C37, capacitance C9, capacitance C10, electrolysis electricity
Hold the ground terminal of C38, one end of electrolytic capacitor C39, ground terminal and source of stable pressure U3, the ground terminal of source of stable pressure U4, capacitance C32's is another
The other end of one end connection capacitance C7, the other end of capacitance C34, one end of diode D5, the input terminal of source of stable pressure U3, bridge-type are whole
The 4th terminals that current circuit is drawn, the other end of the other end connection capacitance C8 of electrolytic capacitor C33, electrolytic capacitor C35 it is another
The second terminals that one end, one end of diode D6, the input terminal of source of stable pressure U4, bridge rectifier are drawn, diode D5's
The other end connects electrolytic capacitor C36, capacitance C9, one end of electrolytic capacitor C38 and positive voltage signal output end, and diode D6's is another
One end connects electrolytic capacitor C37, capacitance C10, the other end of electrolytic capacitor C39 and negative voltage signal output end.
Particularly, first filter amplification circuit includes reference voltage source U1, capacitance C19, capacitance C4, capacitance C5, electricity
Hold C6, resistance R1, slide rheostat RP1, resistance R7, slide rheostat RP2, capacitance C46, resistance R9, capacitance C40, capacitance
C12, resistance R11, capacitance C13, operational amplifier U5A, capacitance C14, resistance R14, capacitance C44, signal output end OUT50mV_
H1, output end OUT50mV_G, capacitance C15, resistance R2, capacitance C16, resistance R3, capacitance C42, operational amplifier U5B, resistance
R13, capacitance C17, operational amplifier U6A, capacitance C18, resistance R17, output end OUT50mV_L1, capacitance C49；Wherein, benchmark
One end of the pin+VS connection capacitances C19 of voltage source U1, the positive voltage signal output end of signal generating circuit, reference voltage source
The grounding pin GND of U1, the other end of capacitance C19, one end of resistance R7, the sliding end of slide rheostat RP2 and fixing end, electricity
Hold one end of C40, capacitance C12 one end ground connection, one end of the other end connection resistance R1 of resistance R7, slide rheostat RP1
One end of fixing end RP1-1, capacitance C46, the fixing end of another fixing end and slide rheostat RP1 of slide rheostat RP2
RP1-3 connections, one end connection of the sliding end RP1-2, resistance R9 of the other end connection slide rheostat RP1 of capacitance C46, resistance
The other end of R9 is connect with one end of the other end of capacitance C40, the other end of capacitance C12, resistance R11, the other end of resistance R1
Connect one end of the output pin Vout of reference voltage source U1, one end of capacitance C4, one end of capacitance C5, capacitance C6, capacitance C4,
The other end ground connection of capacitance C5, capacitance C6, one end of the other end connection capacitance C13 of resistance R11, operational amplifier U5A it is same
To input terminal, the other end of one end of capacitance C13 and one end of resistance R14, the noninverting input of operational amplifier U5A and output
End connection, one end of the other end connection capacitance C44 of resistance R14, signal output end OUT50mV_H1, the other end of capacitance C44
It is grounded with output end OUT50mV_G；The positive voltage signal of the positive power source terminal connection signal generation circuit of operational amplifier U5A exports
It holds, one end of capacitance C15, the other end ground connection of capacitance C15；The negative power end connection signal generation circuit of operational amplifier U5A
Negative voltage signal output end, capacitance C14 one end, capacitance C14 the other end ground connection；The output end of operational amplifier U5A connects
One end of connecting resistance R2, one end of the other end connection capacitance C16 of resistance R2, one end of capacitance C42, one end of resistance R3, fortune
Calculate the reverse input end connection of amplifier U5B, the other end ground connection of capacitance C16, the other end of capacitance C42, resistance R3 it is another
The output end of end connection operational amplifier U5B, the noninverting input ground connection of operational amplifier U5B；The output of operational amplifier U5B
One end of end connection resistance R13, the other end of resistance R13 and one end of capacitance C17, the noninverting input of operational amplifier U6A
Connection, the other end ground connection of capacitance C17, the positive voltage signal of the positive power source terminal connection signal generation circuit of operational amplifier U6A
One end of output end, capacitance C11, the other end ground connection of capacitance C11；The negative power end connection signal of operational amplifier U6A generates
The negative voltage signal output end of circuit, one end of capacitance C18, the other end ground connection of capacitance C18；The output of operational amplifier U6A
One end of end connection resistance R17, the other end connection output end OUT50mV_L1 of resistance R17, one end of capacitance C49, capacitance C49
The other end ground connection.
Particularly, second filter amplification circuit include reference voltage source U2, capacitance C30, capacitance C20, capacitance C21,
Capacitance C22, resistance R4, slide rheostat RP3, resistance R8, slide rheostat RP4, capacitance C47, resistance R10, capacitance C41, electricity
Hold C31, resistance R12, capacitance C23, operational amplifier U7A, capacitance C25, resistance R16, capacitance C45, signal output end
OUT50mV_H2, output end OUT50mV_G, capacitance C24, resistance R5, capacitance C26, resistance R6, capacitance C43, operational amplifier
U7B, resistance R15, capacitance C27, operational amplifier U8A, capacitance C29, resistance R18, output end OUT50mV_L2, capacitance C48；Its
In, one end of the pin+VS connection capacitances C30 of reference voltage source U2, the positive voltage signal output end of signal generating circuit, benchmark
The grounding pin GND of voltage source U2, the other end of capacitance C30, one end of resistance R8, the sliding end of slide rheostat RP4 and solid
Fixed end, one end of capacitance C41, capacitance C31 one end ground connection, one end of the other end connection resistance R1 of resistance R8, sliding variable resistance
The fixing end RP3-1 of device RP3, one end of capacitance C47, another fixing end of slide rheostat RP4 and consolidating for slide rheostat RP3
Fixed end RP3-3 connections, the sliding end RP3-2 of other end connection slide rheostat RP3 of capacitance C47, one end of resistance R10 connect
It connects, the other end of resistance R10 is connect with one end of the other end of capacitance C41, the other end of capacitance C31, resistance R12, resistance R1
The output pin Vout of other end connection reference voltage source U2, one end of capacitance C20, one end of capacitance C21, capacitance C22
One end, capacitance C20, capacitance C21, capacitance C22 other end ground connection, one end of the other end connection capacitance C23 of resistance R12, fortune
Calculate the noninverting input of amplifier U7A, the other end of one end of capacitance C23 and one end of resistance R16, operational amplifier U7A
Noninverting input and output end connection, one end of the other end connection capacitance C45 of resistance R16, signal output end OUT50mV_H2,
The other end of capacitance C45 is grounded with output end OUT50mV_G；The positive power source terminal connection signal generation circuit of operational amplifier U7A
Positive voltage signal output end, capacitance C24 one end, capacitance C24 the other end ground connection；The negative power end of operational amplifier U7A
The negative voltage signal output end of connection signal generation circuit, one end of capacitance C25, the other end ground connection of capacitance C25；Operation amplifier
One end of the output end connection resistance R5 of device U7A, one end of the other end connection capacitance C26 of resistance R5, one end of capacitance C43,
One end of resistance R6, the reverse input end connection of operational amplifier U7B, the other end ground connection of capacitance C26, capacitance C43's is another
It holds, the output end of the other end of resistance R6 connection operational amplifier U7B, the noninverting input ground connection of operational amplifier U7B；Operation
One end of the output end connection resistance R15 of amplifier U7B, the other end of resistance R15 and one end of capacitance C27, operational amplifier
The noninverting input of U8A connects, and the other end ground connection of capacitance C27, the positive power source terminal connection signal of operational amplifier U8A generates electricity
The positive voltage signal output end on road, one end of capacitance C11, the other end ground connection of capacitance C11；The negative supply of operational amplifier U8A
Hold the negative voltage signal output end of connection signal generation circuit, one end of capacitance C29, the other end ground connection of capacitance C29；Operation is put
One end of the output end connection resistance R18 of big device U8A, other end connection output end OUT50mV_L2, the capacitance C48 of resistance R18
One end, capacitance C48 the other end ground connection.
Particularly, the reference voltage source U1, reference voltage source U2 select AD581 reference voltage sources；The operation is put
Big device U5A, operational amplifier U5B, operational amplifier U6A, operational amplifier U7A, operational amplifier U7B, operational amplifier U8A
Select OP200 operational amplifiers.
High-precision signal source board proposed by the present invention uses high-precision reference voltage source for core devices, makes circuit more
Flexibly；Operational amplifier is added, signal jitter is reduced；Upgrading is convenient, at low cost, and power module directly connects 220V alternating currents,
Without additional power supply, application is more extensive.Precision of the present invention is high, and stability is good, and temperature drift is small, and circuit structure is simple, agrees with integrated
The development need of circuit.
Description of the drawings
Fig. 1 is high-precision signal source board structure block diagram provided in an embodiment of the present invention；
Fig. 2 is the circuit structure diagram of signal generating circuit provided in an embodiment of the present invention；
Fig. 3 is the circuit structure diagram of the first filter amplification circuit provided in an embodiment of the present invention；
Fig. 4 is the circuit structure diagram of the second filter amplification circuit provided in an embodiment of the present invention；
Fig. 5 is output terminal structure figure provided in an embodiment of the present invention.
Specific implementation mode
The invention will be further described with reference to the accompanying drawings and examples.It is understood that tool described herein
Body embodiment is used only for explaining the present invention rather than limitation of the invention.It also should be noted that for the ease of retouching
It states, only some but not all contents related to the present invention are shown in the drawings, it is unless otherwise defined, used herein all
Technical and scientific term has the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.It is used herein
Term be intended merely to description specific embodiment, it is not intended that in limitation the present invention.
It please refers to shown in Fig. 1, Fig. 1 is high-precision signal source board structure block diagram provided in an embodiment of the present invention.
High-precision signal source board specifically includes power module 101 in the present embodiment, signal generating circuit 102, first is filtered
Wave amplifying circuit 103, the second filter amplification circuit 104 and leading-out terminal 105.The power module 101 connects alternating current.The letter
Number 102 input terminal of generation circuit connects power module 101, and output end connects 103 input terminal of the first filter amplification circuit, the second filter
104 input terminal of wave amplifying circuit.First filter amplification circuit, 103 output end, the second filter amplification circuit 104 output end electricity
Connect leading-out terminal 105.
The signal generating circuit 102 includes voltage conversion circuit, rectification circuit and voltage stabilizing source circuit, voltage transformation electricity
Road, rectification circuit and voltage stabilizing source circuit are sequentially connected electrically, and the input terminal of voltage conversion circuit connects power module 101.Described
One filter amplification circuit 103 includes the first reference voltage source circuit and the first filter circuit, the first reference voltage source circuit and the
One filter circuit is connected in series with, the output end of the input terminal connection voltage stabilizing source circuit of the first reference voltage source circuit, the first filtering
The output end of circuit connects leading-out terminal 105.Second filter amplification circuit 104 includes the second reference voltage source circuit and the
Two filter circuits, the second reference voltage source circuit and the second filter circuit are connected in series with, the input of the second reference voltage source circuit
The output end of end connection voltage stabilizing source circuit, the output end of the second filter circuit connect leading-out terminal 105.Wherein, first filter
Wave circuit includes the capacitor filter being sequentially connected in series, first-order filtering circuit, second-order filter circuit and high-frequency filter circuit.
Second filter circuit includes the capacitor filter being sequentially connected in series, first-order filtering circuit, second-order filter circuit and height
Frequency filter circuit.
In the present embodiment, the particular circuit configurations of the signal generating circuit 102 are as shown in Fig. 2, the signal generates electricity
Road 102 include power end J1, capacitance C1, transformer T1, capacitance C2, capacitance C3, transformer T2, by diode D1, diode D2,
Bridge rectifier, electrolytic capacitor C32, electrolytic capacitor C33, capacitance C7, capacitance C8, the electricity that diode D3, diode D4 are constituted
Solve capacitance C34, electrolytic capacitor C35, source of stable pressure U3, source of stable pressure U4, electrolytic capacitor C36, electrolytic capacitor C37, capacitance C9, capacitance
C10, electrolytic capacitor C38, electrolytic capacitor C39, positive voltage signal output end, negative voltage signal output end；Wherein, it capacitance C1 and connects
Between power end J1 and transformer T1；The primary line of transformer T1 and transformer T2 are attempted by after capacitance C2, capacitance C3 series connection
It encloses between both ends, the contact after capacitance C2 is connected in series with capacitance C3 connect power end J1；Transformer T2 secondary coils are led to
The first to three terminals, bridge rectifier lead to first to terminals；The first wiring that transformer T2 secondary coils are drawn
End, the second terminals are separately connected the first terminals of bridge rectifier extraction, third terminals；Transformer T2 secondary coils
The third terminals connection electrolytic capacitor C32 of extraction, capacitance C33, capacitance C7, capacitance C8, electrolytic capacitor C34, electrolytic capacitor
C35, electrolytic capacitor C36, electrolytic capacitor C37, capacitance C9, capacitance C10, electrolytic capacitor C38, one end of electrolytic capacitor C39, ground connection
The ground terminal of the ground terminal of end and source of stable pressure U3, source of stable pressure U4, the other end, the capacitance of the other end connection capacitance C7 of capacitance C32
The 4th terminals that the other end of C34, one end of diode D5, the input terminal of source of stable pressure U3, bridge rectifier are drawn, electrolysis
The other end, the other end of electrolytic capacitor C35, one end of diode D6, the source of stable pressure U4 of the other end connection capacitance C8 of capacitance C33
Input terminal, the second terminals for drawing of bridge rectifier, the other end connection electrolytic capacitor C36 of diode D5, capacitance C9,
One end of electrolytic capacitor C38 and positive voltage signal output end, the other end connection electrolytic capacitor C37 of diode D6, capacitance C10,
The other end and negative voltage signal output end of electrolytic capacitor C39.
In the present embodiment, the particular circuit configurations of first filter amplification circuit 103 are as shown in figure 3, first filter
Wave amplifying circuit 103 includes reference voltage source U1, capacitance C19, capacitance C4, capacitance C5, capacitance C6, resistance R1, slide rheostat
RP1, resistance R7, slide rheostat RP2, capacitance C46, resistance R9, capacitance C40, capacitance C12, resistance R11, capacitance C13, operation
Amplifier U5A, capacitance C14, resistance R14, capacitance C44, signal output end OUT50mV_H1, output end OUT50mV_G, capacitance
C15, resistance R2, capacitance C16, resistance R3, capacitance C42, operational amplifier U5B, resistance R13, capacitance C17, operational amplifier
U6A, capacitance C18, resistance R17, output end OUT50mV_L1, capacitance C49.Pin+VS connection capacitances the C19 of reference voltage source U1
One end, signal generating circuit 102 positive voltage signal output end, the grounding pin GND of reference voltage source U1, capacitance C19
The other end, one end of resistance R7, the sliding end of slide rheostat RP2 and fixing end, one end of capacitance C40, capacitance C12 one end
Ground connection, one end of other end connection resistance R1 of resistance R7, one end of the fixing end RP1-1 of slide rheostat RP1, capacitance C46,
Another fixing end of slide rheostat RP2 is connect with the fixing end RP1-3 of slide rheostat RP1, the other end connection of capacitance C46
One end connection of the sliding end RP1-2, resistance R9 of slide rheostat RP1, the other end of resistance R9 and the other end of capacitance C40,
One end connection of the other end, resistance R11 of capacitance C12, the output pin of the other end connection reference voltage source U1 of resistance R1
Vout, one end of capacitance C4, one end of capacitance C5, capacitance C6 one end, capacitance C4, capacitance C5, capacitance C6 the other end ground connection,
One end of the other end connection capacitance C13 of resistance R11, the noninverting input of operational amplifier U5A, one end of capacitance C13 it is another
One end is connect with one end of resistance R14, the noninverting input of operational amplifier U5A and output end, the other end connection of resistance R14
One end of capacitance C44, signal output end OUT50mV_H1, the other end and the output end OUT50mV_G of capacitance C44 are grounded；Operation
The positive voltage signal output end of the positive power source terminal connection signal generation circuit 102 of amplifier U5A, one end of capacitance C15, capacitance
The other end of C15 is grounded；The negative voltage signal output end of the negative power end connection signal generation circuit 102 of operational amplifier U5A,
One end of capacitance C14, the other end ground connection of capacitance C14；One end of the output end connection resistance R2 of operational amplifier U5A, resistance
One end of the other end connection capacitance C16 of R2, one end of capacitance C42, one end of resistance R3, operational amplifier U5B it is reversed defeated
Enter end connection, the other end ground connection of capacitance C16, the other end of capacitance C42, the other end connection operational amplifier U5B of resistance R3
Output end, operational amplifier U5B noninverting input ground connection；The one of the output end connection resistance R13 of operational amplifier U5B
End, the other end of resistance R13 are connect with the noninverting input of one end of capacitance C17, operational amplifier U6A, and capacitance C17's is another
End ground connection, the positive voltage signal output end of the positive power source terminal connection signal generation circuit 102 of operational amplifier U6A, capacitance C11
One end, the other end ground connection of capacitance C11；The negative voltage of the negative power end connection signal generation circuit 102 of operational amplifier U6A is believed
One end of number output end, capacitance C18, the other end ground connection of capacitance C18；The output end connection resistance R17's of operational amplifier U6A
One end, the other end connection output end OUT50mV_L1 of resistance R17, one end of capacitance C49, the other end ground connection of capacitance C49.
In the present embodiment, the particular circuit configurations of second filter amplification circuit 104 are as shown in figure 4, second filter
Wave amplifying circuit 104 includes reference voltage source U2, capacitance C30, capacitance C20, capacitance C21, capacitance C22, resistance R4, sliding variable resistance
Device RP3, resistance R8, slide rheostat RP4, capacitance C47, resistance R10, capacitance C41, capacitance C31, resistance R12, capacitance C23, fortune
Calculate amplifier U7A, capacitance C25, resistance R16, capacitance C45, signal output end OUT50mV_H2, output end OUT50mV_G, capacitance
C24, resistance R5, capacitance C26, resistance R6, capacitance C43, operational amplifier U7B, resistance R15, capacitance C27, operational amplifier
U8A, capacitance C29, resistance R18, output end OUT50mV_L2, capacitance C48 and operational amplifier U6B, operational amplifier U8B.Base
One end of the pin+VS connection capacitances C30 of reference voltage source U2, the positive voltage signal output end of signal generating circuit 102, benchmark electricity
The grounding pin GND of potential source U2, the other end of capacitance C30, one end of resistance R8, the sliding end of slide rheostat RP4 and fixation
End, one end of capacitance C41, capacitance C31 one end ground connection, one end of the other end connection resistance R1 of resistance R8, slide rheostat
The fixing end RP3-1 of RP3, one end of capacitance C47, the fixation of another fixing end and slide rheostat RP3 of slide rheostat RP4
RP3-3 connections, the sliding end RP3-2 of other end connection slide rheostat RP3 of capacitance C47, one end of resistance R10 is held to connect,
The other end of resistance R10 is connect with one end of the other end of capacitance C41, the other end of capacitance C31, resistance R12, and resistance R1's is another
One end connects one end of the output pin Vout of reference voltage source U2, one end of capacitance C20, one end of capacitance C21, capacitance C22,
The other end ground connection of capacitance C20, capacitance C21, capacitance C22, one end of the other end connection capacitance C23 of resistance R12, operation amplifier
The noninverting input of device U7A, the other end of one end of capacitance C23 and one end of resistance R16, operational amplifier U7A it is in the same direction defeated
Enter end and output end connection, one end of the other end connection capacitance C45 of resistance R16, signal output end OUT50mV_H2, capacitance
The other end of C45 is grounded with output end OUT50mV_G；The positive power source terminal connection signal generation circuit 102 of operational amplifier U7A
One end of positive voltage signal output end, capacitance C24, the other end ground connection of capacitance C24；The negative power end of operational amplifier U7A connects
Connect the negative voltage signal output end of signal generating circuit 102, one end of capacitance C25, the other end ground connection of capacitance C25；Operation is put
One end of the output end connection resistance R5 of big device U7A, one end of the other end connection capacitance C26 of resistance R5, the one of capacitance C43
The reverse input end connection at end, one end of resistance R6, operational amplifier U7B, the other end ground connection of capacitance C26, capacitance C43's is another
One end, resistance R6 other end connection operational amplifier U7B output end, the noninverting input ground connection of operational amplifier U7B；Fortune
Calculate one end of the output end connection resistance R15 of amplifier U7B, the other end of resistance R15 and one end of capacitance C27, operation amplifier
The noninverting input of device U8A connects, and the other end ground connection of capacitance C27, the positive power source terminal connection signal of operational amplifier U8A generates
The positive voltage signal output end of circuit 102, one end of capacitance C11, the other end ground connection of capacitance C11；Operational amplifier U8A's is negative
The negative voltage signal output end of power end connection signal generation circuit 102, one end of capacitance C29, another termination of capacitance C29
Ground；One end of the output end connection resistance R18 of operational amplifier U8A, the other end connection output end OUT50mV_ of resistance R18
One end of L2, capacitance C48, the other end ground connection of capacitance C48.The noninverting input of the operational amplifier U6B, reverse input end
It is grounded after connection, the noninverting input of the operational amplifier U8B, reverse input end are grounded after connecting.
As shown in figure 5, signal output end OUT50mV_H1, signal output end OUT50mV_H2, output end OUT50mV_G,
Three end RP1_1, RP1_2, RP1_3 of output end OUT50mV_L1, output end OUT50mV_L2, slide rheostat RP1, sliding become
Three end RP3_1, RP3_2, RP3_3 and leading-out terminal 105 of resistance device RP3 are correspondingly connected with.The leading-out terminal 105 refers in Fig. 5
J2.
It should be noted that the source of stable pressure U3 selects 7815 serial source of stable pressure, source of stable pressure U4 to select in the present embodiment
7915 serial source of stable pressure.The reference voltage source U1, reference voltage source U2 select AD581 reference voltage sources；The operation is put
Big device U5A, operational amplifier U5B, operational amplifier U6A, operational amplifier U6B, operational amplifier U7A, operational amplifier
U7B, operational amplifier U8A, operational amplifier U8B select OP200 operational amplifiers.The specification of all elements in Fig. 2-Fig. 5
It is to generate the design of 0-50mV high-precision signals, present invention voltage devices on the basis of reference voltage source AD581 are equipped with operation
Amplifier OP200 is filtered amplification.Power module 101 is directly exchanged using alternating current 220V, and transformer T1, transformer T2 are passed through
And the bridge rectifier rectification being made of diode D1, diode D2, diode D3, diode D4.Be input to source of stable pressure U3,
Source of stable pressure U4 finally generates DC voltage ± 15V.Wherein, the silk that taken a policy in power module 101 is protected.Reference voltage
By electric resistance partial pressure generate target needed for small signal, by capacitor filter, first-order filtering circuit, second-order filter circuit and
High-frequency filter circuit carries out capacitor filtering, first-order filtering, second-order filter, High frequency filter successively, higher-pressure region and low-pressure area ground wire every
From generation high-precision low jitter signal voltage source.
In practical operation, it is briefly described as follows for the wiring rule of foregoing circuit：1,2 pieces of region cloth of forceful electric power light current point
Line.2, add between forceful electric power and climb line.3, signal wire walks welding surface.4, ground wire walks component side.5, the capacitance on amplifier side is close proximity to fortune
It puts.6, forceful electric power light current socket puts 2 side of plank, refers to J1 and J2.7,1 ‰ precision of resistance.8, capacitance 1nF275V (is not found
1000V's).Using polypropylene film capacitance.9, transformer periphery not cabling.10, operational amplifier A D581 ground wires and source of stable pressure
7815,7915 ground wire of source of stable pressure is connected directly, and AD581 ground wires are connected with other ground wires again.11, silk-screen color distinguishes higher-pressure region
And low-pressure area.12,4 laminate.
Technical scheme of the present invention uses high-precision reference voltage source for core devices, keeps circuit more flexible；Addition fortune
Amplifier is calculated, signal jitter is reduced；Upgrading is convenient, at low cost, and power module directly connects alternating current, is not necessarily to additional power supply, answers
With more extensive.Precision of the present invention is high, and stability is good, and temperature drift is small, and circuit structure is simple, agrees with the development need of integrated circuit.
Note that above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The present invention is not limited to specific embodiments described here, can carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out to the present invention by above example
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
May include other more equivalent embodiments, and the scope of the present invention is determined by scope of the appended claims.
Claims (1)
1. a kind of high-precision signal source board, which is characterized in that including power module, signal generating circuit, the first filter and amplification
Circuit, the second filter amplification circuit and leading-out terminal；The power module connects alternating current；The signal generating circuit input terminal connects
Power module is connect, output end connects the first filter amplification circuit input terminal, the second filter amplification circuit input terminal；First filter
Wave amplification circuit output end, the second filter amplification circuit output end are electrically connected leading-out terminal；Wherein, the signal generating circuit packet
Voltage conversion circuit, rectification circuit and voltage stabilizing source circuit are included, voltage conversion circuit, rectification circuit and voltage stabilizing source circuit are electrically connected successively
It connects, the input terminal of voltage conversion circuit connects power module；First filter amplification circuit includes the first reference voltage source electricity
Road and the first filter circuit, the first reference voltage source circuit and the first filter circuit are connected in series with, the first reference voltage source circuit
Input terminal connection voltage stabilizing source circuit output end, the output end of the first filter circuit connects leading-out terminal；Second filtering
Amplifying circuit includes the second reference voltage source circuit and the second filter circuit, the second reference voltage source circuit and the second filter circuit
It is connected in series with, the output end of the input terminal connection voltage stabilizing source circuit of the second reference voltage source circuit, the output of the second filter circuit
End connection leading-out terminal；First filter circuit includes the capacitor filter being sequentially connected in series, first-order filtering circuit, two
Rank filter circuit and high-frequency filter circuit；Second filter circuit includes the capacitor filter being sequentially connected in series, single order
Filter circuit, second-order filter circuit and high-frequency filter circuit；The signal generating circuit includes power end J1, capacitance C1, transformation
Device T1, capacitance C2, capacitance C3, transformer T2, the bridge-type that is made of diode D1, diode D2, diode D3, diode D4 are whole
Current circuit, electrolytic capacitor C32, electrolytic capacitor C33, capacitance C7, capacitance C8, electrolytic capacitor C34, electrolytic capacitor C35, source of stable pressure
U3, source of stable pressure U4, electrolytic capacitor C36, electrolytic capacitor C37, capacitance C9, capacitance C10, electrolytic capacitor C38, electrolytic capacitor C39, just
Voltage signal output end, negative voltage signal output end；Wherein, capacitance C1 is attempted by between power end J1 and transformer T1；Capacitance
It is attempted by between transformer T1 and the primary coil both ends of transformer T2 after C2, capacitance C3 series connection, capacitance C2 connects with capacitance C3
Contact connection power end J1 after connection；Transformer T2 secondary coils lead to the first to three terminals, and bridge rectifier draws
Go out to have first to terminals；The first terminals, the second terminals of transformer T2 secondary coils extraction are separately connected bridge rectifier
The first terminals, the third terminals of circuit extraction；The third terminals that transformer T2 secondary coils are drawn connect electrolytic capacitor
C32, capacitance C33, capacitance C7, capacitance C8, electrolytic capacitor C34, electrolytic capacitor C35, electrolytic capacitor C36, electrolytic capacitor C37,
Capacitance C9, capacitance C10, electrolytic capacitor C38, one end of electrolytic capacitor C39, ground terminal and source of stable pressure U3 ground terminal, source of stable pressure
The ground terminal of U4, the other end of other end connection capacitance C7 of capacitance C32, the other end of capacitance C34, diode D5 one end,
The 4th terminals that input terminal, the bridge rectifier of source of stable pressure U3 is drawn, the other end connection capacitance C8's of electrolytic capacitor C33
The other end, the other end of electrolytic capacitor C35, one end of diode D6, the input terminal of source of stable pressure U4, bridge rectifier are drawn
Second terminals, other end connection electrolytic capacitor C36, capacitance C9, one end of electrolytic capacitor C38 and the positive voltage letter of diode D5
Number output end, the other end connection electrolytic capacitor C37 of diode D6, the other end and negative voltage of capacitance C10, electrolytic capacitor C39
Signal output end；First filter amplification circuit include reference voltage source U1, capacitance C19, capacitance C4, capacitance C5, capacitance C6,
Resistance R1, slide rheostat RP1, resistance R7, slide rheostat RP2, capacitance C46, resistance R9, capacitance C40, capacitance C12, resistance
R11, capacitance C13, operational amplifier U5A, capacitance C14, resistance R14, capacitance C44, signal output end OUT50mV_H1, output end
OUT50mV_G, capacitance C15, resistance R2, capacitance C16, resistance R3, capacitance C42, operational amplifier U5B, resistance R13, capacitance
C17, operational amplifier U6A, capacitance C18, resistance R17, output end OUT50mV_L1, capacitance C49；Wherein, reference voltage source U1
One end of pin+VS connection capacitances C19, signal generating circuit positive voltage signal output end, the ground connection of reference voltage source U1
Pin GND, the other end of capacitance C19, one end of resistance R7, the sliding end of slide rheostat RP2 and fixing end, capacitance C40
One end, capacitance C12 one end ground connection, one end of the other end connection resistance R1 of resistance R7, the fixing end of slide rheostat RP1
One end of RP1-1, capacitance C46, another fixing end of slide rheostat RP2 connect with the fixing end RP1-3 of slide rheostat RP1
It connects, one end connection of the sliding end RP1-2, resistance R9 of the other end connection slide rheostat RP1 of capacitance C46, resistance R9's is another
One end is connect with one end of the other end of capacitance C40, the other end of capacitance C12, resistance R11, the other end linker of resistance R1
The output pin Vout of reference voltage source U1, one end of capacitance C4, one end of capacitance C5, capacitance C6 one end, capacitance C4, capacitance
The other end ground connection of C5, capacitance C6, one end of the other end connection capacitance C13 of resistance R11, operational amplifier U5A it is in the same direction defeated
Enter end, the other end of one end of capacitance C13 connects with one end of resistance R14, the noninverting input of operational amplifier U5A and output end
Connect, one end of the other end of resistance R14 connection capacitance C44, signal output end OUT50mV_H1, the other end of capacitance C44 with it is defeated
Outlet OUT50mV_G ground connection；The positive voltage signal output end of the positive power source terminal connection signal generation circuit of operational amplifier U5A,
One end of capacitance C15, the other end ground connection of capacitance C15；The negative power end connection signal generation circuit of operational amplifier U5A is born
One end of voltage signal output end, capacitance C14, the other end ground connection of capacitance C14；The output end connection electricity of operational amplifier U5A
One end of R2 is hindered, one end of the other end connection capacitance C16 of resistance R2, one end of capacitance C42, one end of resistance R3, operation are put
The reverse input end connection of big device U5B, the other end ground connection of capacitance C16, the other end of capacitance C42, the other end of resistance R3 connect
Connect the output end of operational amplifier U5B, the noninverting input ground connection of operational amplifier U5B；The output end of operational amplifier U5B connects
The other end of one end of connecting resistance R13, resistance R13 is connect with the noninverting input of one end of capacitance C17, operational amplifier U6A,
The other end of capacitance C17 is grounded, the positive voltage signal output of the positive power source terminal connection signal generation circuit of operational amplifier U6A
It holds, one end of capacitance C11, the other end ground connection of capacitance C11；The negative power end connection signal generation circuit of operational amplifier U6A
Negative voltage signal output end, capacitance C18 one end, capacitance C18 the other end ground connection；The output end of operational amplifier U6A connects
One end of connecting resistance R17, the other end connection output end OUT50mV_L1 of resistance R17, one end of capacitance C49, capacitance C49's is another
One end is grounded；Second filter amplification circuit includes reference voltage source U2, capacitance C30, capacitance C20, capacitance C21, capacitance
C22, resistance R4, slide rheostat RP3, resistance R8, slide rheostat RP4, capacitance C47, resistance R10, capacitance C41, capacitance
C31, resistance R12, capacitance C23, operational amplifier U7A, capacitance C25, resistance R16, capacitance C45, signal output end OUT50mV_
H2, output end OUT50mV_G, capacitance C24, resistance R5, capacitance C26, resistance R6, capacitance C43, operational amplifier U7B, resistance
R15, capacitance C27, operational amplifier U8A, capacitance C29, resistance R18, output end OUT50mV_L2, capacitance C48；Wherein, benchmark
One end of the pin+VS connection capacitances C30 of voltage source U2, the positive voltage signal output end of signal generating circuit, reference voltage source
The grounding pin GND of U2, the other end of capacitance C30, one end of resistance R8, the sliding end of slide rheostat RP4 and fixing end, electricity
Hold one end of C41, capacitance C31 one end ground connection, one end of the other end connection resistance R1 of resistance R8, slide rheostat RP3
One end of fixing end RP3-1, capacitance C47, the fixing end of another fixing end and slide rheostat RP3 of slide rheostat RP4
RP3-3 connections, one end connection of the sliding end RP3-2, resistance R10 of the other end connection slide rheostat RP3 of capacitance C47, electricity
The other end of resistance R10 is connect with one end of the other end of capacitance C41, the other end of capacitance C31, resistance R12, and resistance R1's is another
Hold one end of the output pin Vout for connecting reference voltage source U2, one end of capacitance C20, one end of capacitance C21, capacitance C22, electricity
Hold the other end ground connection of C20, capacitance C21, capacitance C22, one end of the other end connection capacitance C23 of resistance R12, operational amplifier
The noninverting input of U7A, the input in the same direction of the other end of one end of capacitance C23 and one end of resistance R16, operational amplifier U7A
End and output end connection, one end of the other end connection capacitance C45 of resistance R16, signal output end OUT50mV_H2, capacitance C45
The other end be grounded with output end OUT50mV_G；The positive voltage of the positive power source terminal connection signal generation circuit of operational amplifier U7A
One end of signal output end, capacitance C24, the other end ground connection of capacitance C24；The negative power end connection signal of operational amplifier U7A
The negative voltage signal output end of generation circuit, one end of capacitance C25, the other end ground connection of capacitance C25；Operational amplifier U7A's
Output end connects one end of resistance R5, one end of other end connection capacitance C26 of resistance R5, one end of capacitance C43, resistance R6
The reverse input end connection of one end, operational amplifier U7B, the other end ground connection of capacitance C26, the other end, the resistance R6 of capacitance C43
Other end connection operational amplifier U7B output end, the noninverting input ground connection of operational amplifier U7B；Operational amplifier U7B
Output end connection resistance R15 one end, the other end of resistance R15 and one end of capacitance C27, operational amplifier U8A it is in the same direction
Input terminal connects, the other end ground connection of capacitance C27, the positive electricity of the positive power source terminal connection signal generation circuit of operational amplifier U8A
Press one end of signal output end, capacitance C11, the other end ground connection of capacitance C11；The negative power end connection letter of operational amplifier U8A
The negative voltage signal output end of number generation circuit, one end of capacitance C29, the other end ground connection of capacitance C29；Operational amplifier U8A
Output end connection resistance R18 one end, the other end connection output end OUT50mV_L2 of resistance R18, one end of capacitance C48,
The other end of capacitance C48 is grounded；The reference voltage source U1, reference voltage source U2 select AD581 reference voltage sources；The fortune
Calculate amplifier U5A, operational amplifier U5B, operational amplifier U6A, operational amplifier U7A, operational amplifier U7B, operation amplifier
Device U8A selects OP200 operational amplifiers.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510475633.2A CN105071666B (en) | 2015-08-05 | 2015-08-05 | A kind of high-precision signal source board |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510475633.2A CN105071666B (en) | 2015-08-05 | 2015-08-05 | A kind of high-precision signal source board |
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| CN105071666B true CN105071666B (en) | 2018-11-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106054996A (en) * | 2016-07-18 | 2016-10-26 | 无锡市同翔科技有限公司 | Controllable small-signal voltage source plate |
| CN114840047A (en) * | 2022-05-18 | 2022-08-02 | 安徽大学 | Heavy current control module |
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