CN109634336A - A kind of differential summing circuit and electrical equipment - Google Patents
A kind of differential summing circuit and electrical equipment Download PDFInfo
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- CN109634336A CN109634336A CN201811318006.8A CN201811318006A CN109634336A CN 109634336 A CN109634336 A CN 109634336A CN 201811318006 A CN201811318006 A CN 201811318006A CN 109634336 A CN109634336 A CN 109634336A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/561—Voltage to current converters
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Abstract
A kind of differential summing circuit, it includes input matching circuit module, differential circuit module, signal selecting circuit module and add circuit module, differential circuit module is set to carry out differential process to the differential signal handled by input matching circuit module filtered and voltage follow to export differential action signal, signal selecting circuit module carries out positive adjusting to differential action signal, negative regulation or positive negative regulator, to export differentiation result, to export differentiation result, and differentiation result is added with external signal by processing by add circuit module, the differential summing circuit can carry out positive adjusting or negative regulation or positive negative regulator to differential action signal by signal selecting circuit, so that precision height of differentiating, differential action signal is avoided simultaneously to be distorted in output；Meanwhile add circuit module is also set up, external signal can be introduced and carry out being added summation with differential signal, to realize that the parallel feedback circuit for carrying out single argument or multivariable to control system controls.
Description
Technical field
The invention belongs to automatic control technology field more particularly to a kind of differential summing circuit and electrical equipments.
Background technique
Currently, differential circuit includes passive differential circuit and active differentiator, passive differential circuit is by capacitor C and electricity
Resistance R is composed in series, and active differentiator is made of operational amplifier, input capacitance and feedback resistance, although active differential
The output voltage of circuit and the proportional relationship of the time-derivative of input voltage, but the result of differentiating in phase with theory
180 ° of difference, so that input signal loses meaning after differential circuit differential；Simultaneously differential circuit output voltage signal with
The voltage and frequency of input signal are directly proportional, and in high band, operational amplifier is easy to appear saturated phenomenon, lose differential circuit
Function of differentiating is gone, output signal is caused to be distorted；In addition, traditional differential circuit cannot be by introducing external signal and differential
Signal carries out addition summation, so that the parallel feedback circuit control of single argument or multivariable cannot be carried out to control system.
Therefore, there is the output signal distortion after differentiating and cannot in differential circuit present in traditional technical solution
The problem of parallel feedback circuit of control system progress single argument or multivariable is controlled.
Summary of the invention
The present invention provides a kind of differential summing circuit and electrical equipment, it is intended to solve micro- present in traditional technical solution
Parallel circuit exist the output signal distortion after differentiating and control system cannot be carried out single argument or multivariable parallel connection it is anti-
The problem of being fed back to road control.
The invention is realized in this way a kind of differential summing circuit and electrical equipment, comprising:
Be configured as access differential signal, and the differential signal is filtered and voltage follow processing input matching
Circuit module；
It is connect with the input matching circuit module, is configured as carrying out differential process to the differential signal, with output
The differential circuit module of differential action signal；
It is connect with the differential circuit module, is configured as carrying out the differential action signal positive adjusting, negative sense tune
Section or positive negative regulator, to export the signal selecting circuit module of differentiation result；
It is connect with the signal selecting circuit module, is configured as access external input signal, and by the external signal
The add circuit module of processing is added with the differentiation result；And
Respectively with the input matching circuit module, the differential circuit module, the signal selecting circuit module and
The connection of add circuit module, is configured as the power module of power supply.
In addition, a kind of electrical equipment is additionally provided, including above-mentioned differential summing circuit.
Above-mentioned differential summing circuit, by the way that input matching circuit module, differential circuit module, signal selecting circuit is arranged
Module and add circuit module handle differential circuit module to process input matching circuit module filtered and voltage follow
Differential signal carries out differential process to export differential action signal, and signal selecting circuit module is to carry out just to differential action signal
To adjusting, negative regulation or positive negative regulator, to export differentiation result, and by add circuit module to differentiation result and access
External signal carries out addition processing, which can believe the differential action by signal selecting circuit in practical applications
Number positive adjusting or negative regulation or positive negative regulator are carried out, so that precision height of differentiating, while avoiding the differential action
Signal is distorted in output；Meanwhile add circuit module is also set up, external signal can be introduced with differential signal and carry out phase
Add summation, to realize that the parallel feedback circuit for carrying out single argument or multivariable to control system controls；In addition, the differential is summed
The circuit structure of circuit is simple, and at low cost and stable and reliable operation is high.
Detailed description of the invention
Fig. 1 is the module diagram for the differential summing circuit that one embodiment of the invention provides；
Fig. 2 is the circuit diagram for the differential summing circuit that one embodiment of the invention provides；
Fig. 3 is the circuit diagram of the power module for the differential summing circuit that one embodiment of the invention provides.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Fig. 1 shows the module diagram of the differential summing circuit of present pre-ferred embodiments offer, for ease of description,
Only the parts related to this embodiment are shown, and details are as follows:
With reference to Fig. 1, differential summing circuit, comprising: input matching circuit module 10, differential circuit module 20, signal behavior
Circuit module 30, add circuit module 40 and power module 50.
Wherein, input matching circuit module 10 be configured as access differential signal, and differential signal is filtered and electricity
Pressure follows processing；Differential circuit module 20 is connect with input matching circuit module 10, is configured as carrying out differential to differential signal
Processing, to export differential action signal；Signal selecting circuit module 30 is connect with differential circuit module 20, is configured as to differential
Actuating signal carries out positive adjusting, negative regulation or positive negative regulator, to export differentiation result；Add circuit module 40 and signal select
The connection of circuit module 30 is selected, is configured as access external input signal, and external signal is added processing with differentiation result；Power supply
Module 50 respectively with input matching circuit module 10, differential circuit module 20, signal selecting circuit module 30 and add circuit
Module 40 connects, and is configured as powering.
As above-mentioned, the differential signals of 10 pairs of input matching circuit module inputs be filtered and voltage follow processing after Xiang Wei
Parallel circuit module 20 exports, so that differential circuit module 20 differentiate processing and to signal selecting circuit to differential signal
Module 30 exports differential action signal, and signal selecting circuit module 30 carries out positive tune to differential action signal according to the actual situation
Section, negative regulation or positive negative regulator simultaneously export differentiation result to add circuit module 40,40 pairs of add circuit module inputs it is outer
Portion's signal carries out being added summation process and exports result of differentiating with differentiation result.
In the present embodiment, it is handled by the filtering of input matching circuit module 10 and voltage follow for 20 pairs of differential circuit module
Differential signal carry out differential process to export differential action signal, signal selecting circuit module 30 selects positive adjusting, negative sense
It adjusts and just one of negative regulator is adjusted differential action signal to export differentiation result, and pass through add circuit mould
Block 40 carries out differentiation result with the external signal of access to be added processing, which can pass through letter in practical applications
Number selection circuit carries out positive adjusting or negative regulation or positive negative regulator to differential action signal, so that precision of differentiating
Height, while avoiding differential action signal and being distorted in output；Meanwhile add circuit module 40 is also set up, it can introduce
External signal carries out being added summation with differential signal, to realize the parallel feedback for carrying out single argument or multivariable to control system
Circuit control；In addition, the circuit structure of the differential summing circuit is simple, at low cost and stable and reliable operation is high.
Fig. 2 is referred in one of the embodiments, and differential circuit module 20 includes: switch control unit 203, differential list
Member 201 and Derivative Feedback unit 202；Wherein, switch control unit 203 is configured as access switch control signal；Differential list
Member 201 is connect with input matching circuit module 10 and switch control unit 203, is configured as carrying out at differential differential signal
Reason, and output differential action signal is controlled according to switch control signal；Derivative Feedback unit 202 respectively with differentiation element 201 and
Switch control unit 203 connects, and is configured as being controlled according to switch control signal to differential action signal progress voltage follow.
Fig. 2 is referred in one of the embodiments, and differentiation element 201 includes: the first operational amplifier A1, the first current potential
Device P1, the second potentiometer P2, third potentiometer P3, first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4,
Five resistance R5, the 6th resistance R6, the 7th resistance R7, the first electronic switch S1 and the first multipole switch CM1；Wherein, the first electricity
The first end ground connection of R1 is hindered, the second end of first resistor R1 is connect with the first end of third potentiometer P3, third potentiometer P3's
Second end, the first end of the second potentiometer P2, the output end of the first end of the 7th resistance R7 and the first operational amplifier A1 are total
It connects, the second end of the 7th resistance R7 is connect with the first end of the first electronic switch S1, the second end conduct of the first electronic switch S1
The output end of differentiation element 201 is simultaneously connect with Derivative Feedback unit 202 and signal selecting circuit module 30, third potentiometer respectively
The control terminal of P3, the first end of second resistance R2, the first end of the first end of 3rd resistor R3 and the 4th resistance R4 connect altogether, and
The second end of two resistance R2 is connect with the first contact of the first multipole switch CM1, the second end of 3rd resistor R3 and the first multitool
The second contact of switch CM1 connects, and the second end of the 4th resistance R4 is connect with the third contact of the first multipole switch CM1, and first
The 4th contact of multipole switch CM1, the 6th contact of the first multipole switch CM1, the 8th contact of the first multipole switch CM1,
The tenth contact of one multipole switch CM1 and the 12nd contact of the first multipole switch CM1 connect altogether, the first multipole switch CM1's
5th contact, the 7th contact of the first multipole switch CM1, the 9th contact of the first multipole switch CM1 and the first multipole switch
The 11st contact of CM1 connects altogether, and the sliding end of the first multipole switch CM1 is connect with Derivative Feedback unit 202, the second potentiometer P2
Second end, the first end of the control terminal of the second potentiometer P2 and the first potentiometer P1 connect altogether, the second of the first potentiometer P1
The first end at end, the control terminal of the first potentiometer P1 and the 5th resistance R5 is connected to the homophase input of the first operational amplifier A1 altogether
End, the first input end of the second end of the 5th resistance R5 as differentiation element 201 and output with input matching circuit module 10
End connection, the inverting input terminal of the first operational amplifier A1 are connect with the first end of the 6th resistance R6, and the second of the 6th resistance R6
It holds the second input terminal as differentiation element 201 and is connect with the output end of Derivative Feedback unit 202.
Fig. 2 is referred in one of the embodiments, and Derivative Feedback unit 202 includes: second operational amplifier A2, second
Electronic switch S2, the 8th resistance R8, the 9th resistance R9, the tenth resistance R10, first switch tube Q1, second switch Q2, third are opened
Close pipe Q3, first diode D1, first capacitor C1 and the second capacitor C2；Wherein, the first end conduct of the second electronic switch S2
The first input end of Derivative Feedback unit 202 is simultaneously connect, the first end conduct of the 8th resistance R8 with the output end of differentiation element 201
Second input terminal of Derivative Feedback unit 202 is simultaneously connect with differentiation element 201, the second end of the second electronic switch S2 and the 9th electricity
The first end connection of R9 is hindered, the second end of the 9th resistance R9 is connect with the control terminal of second switch Q2, second switch Q2's
Input terminal is connect with the first voltage output end VCC1 of power module 50, the output end of second switch Q2 and the second operation amplifier
The non-inverting input terminal of device A2 connects, and the second end of the 8th resistance R8 is connect with the input terminal of first switch tube Q1, first switch tube
The first end of the output end of Q1, the first end of the tenth resistance R10 and the second capacitor C2 connects altogether, the second end of the tenth resistance R10
It is connect with the control terminal of third switching tube Q3, the input terminal of third switching tube Q3 and the first voltage output end of power module 50
The output end of VCC1 connection, third switching tube Q3 is connect with the inverting input terminal of second operational amplifier A3, the second operation amplifier
The second end of the output end of device A3 and the second capacitor C2 connect the output end and and differentiation element as Derivative Feedback unit 202 altogether
201 the second input terminal connection, the of the control terminal of first switch tube Q1, the anode of first diode D1 and first capacitor C1
One end connects altogether, the cathode of first diode D1, the second end of first capacitor C1, the control terminal of the second electronic switch S2 connect altogether and with
First output end of switch control unit 203 connects.
Fig. 2 is referred in one of the embodiments, and switch control unit 203 includes: eleventh resistor R11, the 12nd electricity
Hinder R12, thirteenth resistor R13, the 14th resistance R14, the 15th resistance R15, the 16th resistance R16, the 4th switching tube Q4, the
Five switching tube Q5 and the second diode D2；Wherein, input terminal of the anode of the second diode D2 as switch control unit 203
Switch control signal is accessed, the cathode of the second diode D2 is connect with the first end of the 16th resistance R16, the 16th resistance R16
Second end, the first end of the 14th resistance R14 and the first end of the 15th resistance R15 connect altogether, the of the 15th resistance R15
Two ends ground connection, the second end of the 14th resistance R14 are connect with the control terminal of the 5th switching tube Q5, the input of the 5th switching tube Q5
End, the first end of thirteenth resistor R13 and twelfth resistor R12 first end connect constitute the of switch control unit 203 altogether
Two output ends, the second end of twelfth resistor R12 are connect with the control terminal of the 4th switching tube Q4, and the second of thirteenth resistor R13
End is connect with the output end of the 4th switching tube Q4, and the output end of the 5th switching tube Q5 is connect with the first end of eleventh resistor R11,
The input terminal of the second end of eleventh resistor R11 and the 4th switching tube Q4 connect the first output for constituting switch control unit 203 altogether
End.
In the present embodiment, the first operational amplifier A1 generates the differential action, and second operational amplifier A2 is to feedback differential
Actuating signal, third potentiometer P3 adjust the gain of the differential action, select second resistance R2, the by the first multipole switch CM1
A range in tri- ranges of three resistance R3 and the 4th resistance R4, can in selected range ability by third potentiometer P3
Realize continuous adjustment derivative action time.In differential summing circuit work, the first electronic switch S1 closure, the second electronic cutting
It closes S2 to disconnect, first switch tube Q1 cut-off, if the differential signal for starting input is zero, be transported by the differential of differential summing circuit
The signal exported after calculation is also zero, i.e. outputting and inputting for second operational amplifier A2 is zero, so that the second capacitor C2 does not fill
Electricity；If the differential signal for starting input is not zero, the immediately obtained differential signal of the output end of the first operational amplifier A1 multiplies
With the voltage signal of gain, voltage signal is made to pass through third potentiometer P3 to second resistance R2,3rd resistor R3 and the 4th electricity
It hinders one in R4 and is charged by the second multipole switch CM2 to the second capacitor C2, the charging voltage of the second capacitor C2 reaches defeated
Out voltage signal multiplied by third potentiometer P3 partial pressure coefficient when, tend to put the second operation by the electric current of the second capacitor C2
The current potential of the inverting input terminal of big device A2 drops to zero hereinafter, when the non-inverting input terminal of second operational amplifier A2 is zero-bias,
In the presence of not having potential difference between two input terminals of second operational amplifier A2, the output end of second operational amplifier A2 is defeated
A positive electricity is pressed onto the noninverting input of the first operational amplifier A1 out, and has acting in opposition to differential signal, in the second electricity
During holding C2 charging, the output voltage of second operational amplifier A2 increases, but differential action signal is reduced, when differential action signal
When being reduced to zero potential, the second capacitor C2 does not have electric current to pass by, and two input terminals of second operational amplifier A2 are zero potential,
Second capacitor C2 charging complete at this time.Potential difference i.e. between two input terminals of the first operational amplifier A1 is zero, the second electricity
Hold C2 charging, the output voltage for being applied to the second operational amplifier A2 of the non-inverting input terminal of the first operational amplifier A1 is equal to
The voltage of the inverting input terminal of second operational amplifier A2 is simultaneously equal to differential signal.7th potentiometer can offset the second operation and put
The offset voltage of big device A2, if input voltage is zero, output voltage is also zero.First electronic switch S1, the second electronic switch
S2 and first switch tube Q1 is logic control switch, for cancelling the differential action；The switch control that switch control unit 203 accesses
Signal processed is 1 when manually controlling, and is 0 when automatic control, and when manually controlling, the first electronic switch S1 is to disconnect, the second electricity
Sub switch S2 is closure, and first switch tube Q1 is conducting；When automatically controlling, the first electronic switch S1 is closure, the second electronics
Switch S2 is to disconnect, and first switch tube Q1 is cut-off.
Fig. 2 is referred in one of the embodiments, and input matching circuit module 10 includes: third operational amplifier A3, the
17 resistance R17, the 18th resistance R18, third capacitor C3, the 4th capacitor C4, the 5th capacitor C5, the 6th capacitor C6, the 7th electricity
Hold C7 and the second multipole switch CM2；Wherein, the first end of the 17th resistance R17 is as the defeated of input matching circuit module 10
Enter and terminate into differential signal, the second end of the 17th resistance R17, the first end of third capacitor C3, the first end of the 4th capacitor C4,
First end, the first end of the 6th capacitor C6 and the first end of the 7th capacitor C7 of 5th capacitor C5 is connected to third operation amplifier altogether
The non-inverting input terminal of device A3, the second end ground connection of third capacitor C3, the inverting input terminal and the 18th of third operational amplifier A3
The first end of resistance R18 connects, and the second end of the 18th resistance R18 and the output end of third operational amplifier A3 are connect altogether as defeated
Enter the output end of matching circuit module 10, the second end of the 6th capacitor C6, the first movable contact of the second multipole switch CM2, second
The third movable contact of the second movable contact of multipole switch CM2 and the second multipole switch CM2 connect altogether, and the second of the 7th capacitor C7
End, the first normally opened contact of the second multipole switch CM2, the second normally opened contact of the second multipole switch CM2 and the second multitool are opened
Close CM2 the first normally-closed contact connect altogether, the second end of the 4th capacitor C4, the second multipole switch CM2 third normally opened contact and
The 4th normally opened contact of second multipole switch CM2 connects altogether, 5 constant virtues of the second end of the 5th capacitor C5 and the second multipole switch CM2
Open contact connection.In the present embodiment, the gain of third operational amplifier A3 is 1, exports, fourth electricity identical as the polarity of input
Hold C4, the 5th capacitor C5, the 6th capacitor C6, the 7th capacitor C7, the second multipole switch CM2 and the 17th resistance R17 and constitutes filter
Wave unit is filtered the differential signal of access, and third operational amplifier A3 carries out the differential signal after filtering processing
Voltage follow processing, the 16th capacitor limit the passband of third operational amplifier A3, protect differential action signal, prevent noise
Interference.
Fig. 2 is referred in one of the embodiments, and signal selecting circuit module 30 includes: four-operational amplifier A4, the
19 resistance R19, the 20th resistance R20, third diode D3, the 4th diode D4, the first wire jumper unit K1 and second jump
Line unit K2；Wherein, the first end of the 19th resistance R19 and the first positive negative nodal point of the first wire jumper unit K1 are connect altogether as signal
The input terminal of selection circuit module 30 accesses differential action signal, the second end and four-operational amplifier of the 19th resistance R19
The non-inverting input terminal of A4 connects, and the inverting input terminal of four-operational amplifier A4, the first end of the 20th resistance R20, second jump
The second negative nodal point of the second positive node of line unit K2 and the second wire jumper unit K2 connect altogether, the second end of the 20th resistance R20
Ground connection, anode, the cathode of the 4th diode D4 and the output end of four-operational amplifier A4 of third diode D3 connect altogether, the
First positive node of the cathode of three diode D3, the first positive node of the first wire jumper unit K1 and the second wire jumper unit K2 is total
It connects, the first negative section of the anode of the 4th diode D4, the first negative nodal point of the first wire jumper unit K1 and the second wire jumper unit K2
Point connects altogether, the second positive negative nodal point of the first wire jumper unit K1, the second negative nodal point of the first wire jumper unit K1 and the first wire jumper list
The second positive node of first K1 connects the output end for constituting signal selecting circuit module 30 altogether.In the present embodiment, by the first wire jumper list
First K1 and the second wire jumper unit K2 selects one of positive adjusting, negative regulation and positive negative regulator to micro- according to the actual situation
Point actuating signal is adjusted, when with wire jumper by position " ± " connection of the first wire jumper unit K1, the signal selecting circuit mould
Block 30 carries out positive negative regulator to differential action signal, and the differential action signal after positive negative regulator is directly output to add circuit
Module 40；When the position "+" of the first wire jumper unit K1, the position "+" of the second wire jumper unit K2 are connected with wire jumper, the signal
Selection circuit module 30 carries out positive adjusting to differential action signal, and third diode D3 believes the differential action after positive adjust
The inverting input terminal for number feeding back to four-operational amplifier A4 and output are to add circuit module 40；When with wire jumper by the first wire jumper
The position " ﹣ " of unit K1, the second wire jumper unit K2 position " ﹣ " connection when, the signal selecting circuit module 30 is to the differential action
Signal carries out negative regulation, and the positive differential action signal of four-operational amplifier A4 output is disconnected by the 4th diode D4,
The differential action signal for being applied to the non-inverting input terminal of four-operational amplifier A4 is transformed to negative differential actuating signal, and the four or two
Pole pipe D4 exports the negative differential actuating signal to add circuit module 40.In addition, two as four-operational amplifier A4 are defeated
When entering to be not present long time drift between end, it is applied to the inverting input terminal of four-operational amplifier A4 and exports to add circuit
The signal of module 40 is equal to the differential action signal of input, without carrying out positive adjusting or negative regulation to differential action signal
Or positive negative regulator.
Fig. 2 is referred in one of the embodiments, and add circuit module 40 includes: the 5th operational amplifier A5, the 6th fortune
Calculate amplifier A6, the 21st resistance R21, the 22nd resistance R22, the 23rd resistance R23, the 24th resistance R24, the
25 resistance R25, the 26th resistance R26, the 27th resistance R27, the 28th resistance R28, the 29th resistance
R29, the 30th resistance R30, the 31st resistance R31, the 32nd resistance R32, the 33rd resistance R33, the 34th electricity
Hinder R34, the 35th resistance R35, the 4th potentiometer P4, the 5th potentiometer P5, the first voltage-stabiliser tube ZD1, the second voltage-stabiliser tube ZD2,
Third voltage-stabiliser tube ZD3, the 5th diode D5, the 6th diode D6, third multipole switch CM3 and third wire jumper unit K3；Its
In, the first end of the 22nd resistance R22, the first end of the 21st resistance R21, the first end of the 32nd resistance R32,
The first end of 34 resistance R34s and the first end of the 35th resistance R35 are connected to the reverse phase of the 5th operational amplifier A5 altogether
The second end of input terminal, the 34th resistance R34 is connect with the first external signal input terminals, and the second of the 35th resistance R35
End is connect with the second external signal input terminals, the second end of the 21st resistance R21 and the first dynamic touching of third multipole switch CM3
Point connection, the first normally-closed contact of third multipole switch CM3 and the first normally opened contact of third multipole switch CM3 are connected to ground altogether,
The first end of 23rd resistance R23 is connect with the non-inverting input terminal of the 5th operational amplifier A5, and the of the 23rd resistance R23
Two ends ground connection, the output end and the 24th resistance R24 of the second end of the 22nd resistance R22, the 5th operational amplifier A5
First end connect altogether, the second end of the 24th resistance R24, the anode of the 5th diode, the cathode of the 6th diode, the 6th fortune
Inverting input terminal, the first end of the 30th resistance R30 and the first end of the 31st resistance R31 for calculating amplifier A6 connect altogether,
The second end of 31st resistance R31 is connect with the second movable contact of third multipole switch CM3, and the of third multipole switch CM3
The second normally opened contact of two normally-closed contacts and third multipole switch CM3 connect altogether as add circuit module 40 input terminal and with letter
The output end connection of number selection circuit module 30, the third normally opened contact of third multipole switch CM3, third multipole switch CM3
4th normally opened contact, third wire jumper unit K3 first node be connected to altogether ground, the second node and the 5th of third wire jumper unit K3
The control terminal of potentiometer P5 connects, and the third node of third wire jumper unit K3 is connect with the second end of the 32nd resistance R32, the
The first end of five potentiometer P5 and the anode of third voltage-stabiliser tube ZD3 are connected to ground, the second end of the 5th potentiometer P5, third pressure stabilizing altogether
The first end of the cathode of pipe ZD3 and the 33rd resistance R33 connect altogether, the second end and power module of the 33rd resistance R33
50 first voltage output end VCC1 connection, the anode and the 25th resistance of the cathode of the 5th diode, the 6th diode
The first end of R25 is connected to the non-inverting input terminal of the 6th operational amplifier A6, the second end of the 25th resistance R25, the 20th altogether
The first end of six resistance R26 and the first end of the 27th resistance R27 connect altogether, the second end ground connection of the 26th resistance R26,
The second end of 27th resistance R27 is connect with the control terminal of the 4th potentiometer P4, the first end and power supply of the 4th potentiometer P4
The second voltage output end VCC2 connection of module 50, the second end of the 4th potentiometer P4 and the first voltage of power module 50 export
VCC1 connection is held, the output end of the 6th operational amplifier A6 is connect with the first end of the 28th resistance R28, the 28th resistance
The anode of the second end of R28, the first end of the 29th resistance R29 and the first voltage-stabiliser tube ZD1 connects altogether, the first voltage-stabiliser tube ZD1
Cathode connect with the cathode of the second voltage-stabiliser tube ZD2, the plus earth of the second voltage-stabiliser tube ZD2, the second end of the 30th resistance R30
Connect the output end as add circuit module 40 altogether with the second end of the 29th resistance R29.In the present embodiment, the five or two pole
Pipe and the input of the 6th diode protection, the first voltage-stabiliser tube ZD1 and the second voltage-stabiliser tube ZD2 protection output, prevent feedback to addition electricity
The output end overvoltage of road module 40, the 11st capacitor limit the passband of the 15th operational amplifier, add circuit module 40
It can receive two external signals, a bias voltage signal by the 5th potentiometer P5 adjustment, the bias voltage signal can also be received
It can be set by third wire jumper unit K3, the offset voltage of add circuit module 40 can be offset by the 4th potentiometer P4, so that defeated
When the differential action signal entered is zero, output signal is also zero.
Fig. 3 is referred in one of the embodiments, and power module 50 includes: pressure unit 501 and reversal unit
502；Wherein, pressure unit 501 is configured as carrying out input voltage decompression processing to export burning voltage；Reversal unit
502 connect with pressure unit 501, are configured as carrying out positive-negative polarity transformation to burning voltage.
In addition, a kind of electrical equipment is additionally provided, including above-mentioned differential summing circuit.
Beneficial effects of the present invention:
1, positive adjusting or negative sense tune can be carried out to differential action signal by signal selecting circuit in practical applications
Section or positive negative regulator, so that precision height of differentiating, while can be distorted to avoid differential action signal in output.
2, by setting add circuit module, external signal can be introduced and carry out being added summation with differential signal, thus real
The parallel feedback circuit for now carrying out single argument or multivariable to control system controls.
3, the circuit structure of the differential summing circuit is simple, so that it is at low cost, and operation that can be stable, securely and reliably
Property it is high.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of differential summing circuit, which is characterized in that the differential summing circuit includes:
Be configured as access differential signal, and the differential signal is filtered and voltage follow processing input matching circuit
Module；
It is connect with the input matching circuit module, is configured as carrying out differential process to the differential signal, to export differential
The differential circuit module of actuating signal；
Connect with the differential circuit module, be configured as carrying out the differential action signal positive adjusting, negative regulation or
Positive negative regulator, to export the signal selecting circuit module of differentiation result；
It is connect with the signal selecting circuit module, is configured as access external input signal, and by the external signal and institute
State the add circuit module that differentiation result is added processing；And
Respectively with the input matching circuit module, the differential circuit module, the signal selecting circuit module and addition
Circuit module connection, is configured as the power module of power supply.
2. differential summing circuit as described in claim 1, which is characterized in that the differential circuit module includes:
It is configured as the switch control unit of access switch control signal；
It is connect with input matching circuit module and the switch control unit, is configured as carrying out at differential the differential signal
Reason, and according to the differentiation element of the switch control signal control output differential action signal；And
It is connect respectively with the differentiation element and the switch control unit, is configured as being controlled according to the switch control signal
The Derivative Feedback unit of voltage follow is carried out to the differential action signal.
3. differential summing circuit as claimed in claim 2, which is characterized in that the differentiation element includes: the first operation amplifier
Device, the first potentiometer, the second potentiometer, third potentiometer, first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th
Resistance, the 6th resistance, the 7th resistance, the first electronic switch and the first multipole switch；
The first end of the first resistor is grounded, and the first end of the second end of the first resistor and the third potentiometer connects
It connects, the second end of the third potentiometer, the first end of second potentiometer, the first end and first of the 7th resistance
The output end of operational amplifier connects altogether, and the second end of the 7th resistance is connect with the first end of first electronic switch, institute
State the second end of the first electronic switch as the differentiation element output end and respectively with the Derivative Feedback unit and described
The connection of signal selecting circuit module, control terminal, the first end of the second resistance, the 3rd resistor of the third potentiometer
First end and the first end of the 4th resistance connect altogether, the second end of the second resistance and first multipole switch
The connection of first contact, the second end of the 3rd resistor are connect with the second contact of first multipole switch, the 4th electricity
The second end of resistance is connect with the third contact of first multipole switch, the 4th contact of first multipole switch, described
6th contact of one multipole switch, the 8th contact of first multipole switch, first multipole switch the tenth contact with
And the 12nd contact of first multipole switch connects altogether, the 5th contact of first multipole switch, first multitool are opened
The 7th contact, the 9th contact of first multipole switch and the 11st contact of first multipole switch closed connect altogether,
The sliding end of first multipole switch is connect with the Derivative Feedback unit, the second end of second potentiometer, described
The control terminal of two potentiometers and the first end of first potentiometer connect altogether, the second end of first potentiometer, described
The control terminal of one potentiometer and the first end of the 5th resistance are connected to the non-inverting input terminal of first operational amplifier altogether,
The second end of 5th resistance is as the first input end of the differentiation element and defeated with the input matching circuit module
Outlet connection, the inverting input terminal of first operational amplifier are connect with the first end of the 6th resistance, the 6th electricity
The second end of resistance as the differentiation element the second input terminal and connect with the output end of the Derivative Feedback unit.
4. differential summing circuit as claimed in claim 2, which is characterized in that the Derivative Feedback unit includes: the second operation
Amplifier, the second electronic switch, the 8th resistance, the 9th resistance, the tenth resistance, first switch tube, second switch, third switch
Pipe, first diode, first capacitor and the second capacitor；
The first end of second electronic switch as the Derivative Feedback unit first input end and with the differentiation element
Output end connection, the first end of the 8th resistance as the Derivative Feedback unit the second input terminal and with the differential
Unit connection, the second end of second electronic switch connect with the first end of the 9th resistance, and the of the 9th resistance
Two ends are connect with the control terminal of the second switch, the first electricity of the input terminal of the second switch and the power module
Output end connection is pressed, the output end of the second switch is connect with the non-inverting input terminal of the second operational amplifier, described
The second end of 8th resistance is connect with the input terminal of the first switch tube, the output end of the first switch tube, the described tenth
The first end of resistance and the first end of the second capacitor connect altogether, the second end of the tenth resistance and the control of the third switching tube
End connection processed, the input terminal of the third switching tube are connect with the first voltage output end of the power module, and the third is opened
Close pipe output end connect with the inverting input terminal of the second operational amplifier, the output end of the second operational amplifier and
The second end of second capacitor connects the output end as the Derivative Feedback unit and defeated with the second of the differentiation element altogether
Enter end connection, the first end of the control terminal of the first switch tube, the anode of the first diode and the first capacitor
It connects altogether, the cathode of the first diode, the second end of the first capacitor, the control terminal of second electronic switch connect simultaneously altogether
It is connect with the first output end of the switch control unit.
5. differential summing circuit as claimed in claim 2, which is characterized in that the switch control unit includes: the 11st electricity
Resistance, twelfth resistor, thirteenth resistor, the 14th resistance, the 15th resistance, the 16th resistance, the 4th switching tube, the 5th switch
Pipe and the second diode；
Input terminal access switch control signal of the anode of second diode as the switch control unit, described second
The cathode of diode is connect with the first end of the 16th resistance, the second end of the 16th resistance, the 14th resistance
First end and the first end of the 15th resistance connect altogether, the second end ground connection of the 15th resistance, the 14th electricity
The second end of resistance is connect with the control terminal of the 5th switching tube, the input terminal of the 5th switching tube, the thirteenth resistor
First end and the first end of the twelfth resistor connect the second output terminal for constituting the switch control unit altogether, described
The second end of 12 resistance is connect with the control terminal of the 4th switching tube, the second end of the thirteenth resistor and the described 4th
The output end of switching tube connects, and the output end of the 5th switching tube is connect with the first end of the eleventh resistor, and described the
The input terminal of the second end of 11 resistance and the 4th switching tube connects the first output end for constituting the switch control unit altogether.
6. differential summing circuit as described in claim 1, which is characterized in that the input matching circuit module includes: third
Operational amplifier, the 17th resistance, the 18th resistance, third capacitor, the 4th capacitor, the 5th capacitor, the 6th capacitor, the 7th capacitor
And second multipole switch；
The first end of 17th resistance accesses differential signal as the input terminal of the input matching circuit module, and described the
The second end of 17 resistance, the first end of the third capacitor, the first end of the 4th capacitor, the 5th capacitor first
The first end at end, the first end of the 6th capacitor and the 7th capacitor is connected to the same phase of the third operational amplifier altogether
Input terminal, the second end ground connection of the third capacitor, the inverting input terminal of the third operational amplifier and the 18th electricity
The first end of resistance connects, and the second end of the 18th resistance and the output end of the third operational amplifier are connect altogether as described
The output end of input matching circuit module, the second end of the 6th capacitor, the first movable contact of second multipole switch, institute
The third movable contact of the second movable contact and second multipole switch of stating the second multipole switch connects altogether, the 7th capacitor
Second end, the first normally opened contact of second multipole switch, the second normally opened contact of second multipole switch and described
First normally-closed contact of the second multipole switch connects altogether, and second end, the third of second multipole switch of the 4th capacitor are normal
The 4th normally opened contact for opening contact and second multipole switch connects altogether, the second end of the 5th capacitor and more than described second
5th normally opened contact of knife-like switch connects.
7. differential summing circuit as described in claim 1, which is characterized in that the signal selecting circuit module includes: the 4th
Operational amplifier, the 19th resistance, the 20th resistance, third diode, the 4th diode, the first wire jumper unit and second jump
Line unit；
The first end of 19th resistance and the first positive negative nodal point of the first wire jumper unit connect altogether to be selected as the signal
The input terminal for selecting circuit module accesses the differential action signal, and second end and the 4th operation of the 19th resistance are put
The non-inverting input terminal connection of big device, the inverting input terminal of the four-operational amplifier, the first end of the 20th resistance, described the
Second negative nodal point of the second positive node of two wire jumper units and the second wire jumper unit connects altogether, and the of the 20th resistance
Two ends ground connection, the anode of the third diode, the cathode of the 4th diode and the four-operational amplifier it is defeated
Outlet connects altogether, the cathode of the third diode, the first positive node of the first wire jumper unit and the second wire jumper unit
First positive node connects altogether, the first negative nodal point and the second wire jumper of the anode of the 4th diode, the first wire jumper unit
First negative nodal point of unit connects altogether, the second positive negative nodal point of the first wire jumper unit, the first wire jumper unit it is second negative
Second positive node of node and the first wire jumper unit connects the output end for constituting the signal selecting circuit module altogether.
8. differential summing circuit as described in any one of claim 1 to 7, which is characterized in that the add circuit module includes:
5th operational amplifier, the 6th operational amplifier, the 21st resistance, the 22nd resistance, the 23rd resistance, the 24th
Resistance, the 25th resistance, the 26th resistance, the 27th resistance, the 28th resistance, the 29th resistance, the 30th
Resistance, the 31st resistance, the 32nd resistance, the 33rd resistance, the 34th resistance, the 35th resistance, the 4th electricity
Position device, the 5th potentiometer, the first voltage-stabiliser tube, the second voltage-stabiliser tube, third voltage-stabiliser tube, the 5th diode, the 6th diode, third are more
Knife-like switch and third wire jumper unit；
The first end of 22nd resistance, the first end of the 21st resistance, the 32nd resistance first
The first end at end, the first end of the 34th resistance and the 35th resistance is connected to the 5th operation amplifier altogether
The second end of the inverting input terminal of device, the 34th resistance is connect with the first external signal input terminals, and the described 35th
The second end of resistance is connect with the second external signal input terminals, and second end and the third multitool of the 21st resistance are opened
The first of the first movable contact connection closed, the first normally-closed contact of the third multipole switch and the third multipole switch is normally opened
Contact is connected to ground altogether, and the first end of the 23rd resistance is connect with the non-inverting input terminal of the 5th operational amplifier, institute
State the second end ground connection of the 23rd resistance, the output of the second end, the 5th operational amplifier of the 22nd resistance
End and the first end of the 24th resistance connect altogether, the second end of the 24th resistance, the 5th diode anode,
The cathode of 6th diode, the inverting input terminal of the 6th operational amplifier, the first end of the 30th resistance with
And the first end of the 31st resistance connects altogether, the of the second end of the 31st resistance and the third multipole switch
Second normally opened contact of the connection of two movable contacts, the second normally-closed contact of the third multipole switch and the third multipole switch is total
It connects the input terminal as the add circuit module and is connect with the output end of the signal selecting circuit module, the third is more
The third normally opened contact of knife-like switch, the 4th normally opened contact of the third multipole switch, the third wire jumper unit first segment
Point is connected to ground altogether, and the second node of the third wire jumper unit is connect with the control terminal of the 5th potentiometer, and the third is jumped
The third node of line unit is connect with the second end of the 32nd resistance, the first end of the 5th potentiometer and described the
The anode of three voltage-stabiliser tubes is connected to ground, the cathode and the 30th of the second end of the 5th potentiometer, the third voltage-stabiliser tube altogether
The first end of three resistance connects altogether, and the second end of the 33rd resistance and the first voltage output end of the power module connect
It connects, cathode, the anode of the 6th diode and the first end of the 25th resistance of the 5th diode connect altogether
To the non-inverting input terminal of the 6th operational amplifier, the second end of the 25th resistance, the 26th resistance
First end and the first end of the 27th resistance connect altogether, the second end ground connection of the 26th resistance, and described second
The second end of 17 resistance is connect with the control terminal of the 4th potentiometer, the first end of the 4th potentiometer and the power supply
The second voltage output end of module connects, the second end of the 4th potentiometer and the first voltage output end of the power module
Connection, the output end of the 6th operational amplifier are connect with the first end of the 28th resistance, the 28th electricity
The anode of the second end of resistance, the first end of the 29th resistance and first voltage-stabiliser tube connects altogether, first pressure stabilizing
The cathode of pipe is connect with the cathode of second voltage-stabiliser tube, the plus earth of second voltage-stabiliser tube, the 30th resistance
Second end and the second end of the 29th resistance connect the output end as the add circuit module altogether.
9. differential summing circuit as described in claim 1, which is characterized in that the power module includes: to be configured as to defeated
Enter voltage and carries out decompression processing to export the pressure unit of burning voltage；With
It is connect with the pressure unit, is configured as carrying out the burning voltage reversal unit of positive-negative polarity transformation.
10. a kind of electrical equipment, which is characterized in that including the described in any item differential summing circuits of claim 1 to 9.
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| CN201811318006.8A CN109634336B (en) | 2018-11-07 | 2018-11-07 | Differential summation circuit and electric equipment |
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