CN209247858U - A kind of built-in voltage electric current one transmitter - Google Patents
A kind of built-in voltage electric current one transmitter Download PDFInfo
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- CN209247858U CN209247858U CN201821258740.5U CN201821258740U CN209247858U CN 209247858 U CN209247858 U CN 209247858U CN 201821258740 U CN201821258740 U CN 201821258740U CN 209247858 U CN209247858 U CN 209247858U
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Abstract
The utility model discloses a kind of built-in voltage electric current one transmitters, it include power input adjustment and voltage regulator circuit, the polarity inversion circuit and zero adjustment circuit being connect respectively with the output end of power input adjustment and voltage regulator circuit, and the voltage signal amplifying circuit and current signal conversion circuit that are made of four high guaily unit；Power input adjustment and voltage regulator circuit include primary power source input stabilizing circuit and second level adjustment voltage regulator circuit.The utility model realizes the purpose that standard voltage signal and standard current signal can export simultaneously in 12-36V Width funtion supply district.
Description
Technical field
The utility model relates to built-in transmitter field, specifically a kind of built-in voltage electric current one transmitter.
Background technique
Transmitter (transmitter) be the output signal of sensor is changed into can by controller identify signal (or
By sensor input non electrical quantity be converted into electric signal simultaneously amplify so as to for a distant place measure and control signal source) conversion
Device.Sensor and transmitter together constitute with the monitoring signals source of automatic control.Different physical quantitys need different sensor and
Corresponding transmitter.There are many type of transmitter, and the transmitter above industrial control instrument mainly has temperature transmitter, pressure to become
Send device, flow transmitter, current transducer, voltage transmitter etc..
Built-in transmitter is the transmitter for being set to sensor internal, and traditional built-in transmitter can only be in determining condition
Under, single, fixed forms a kind of output mode.When a transmitter accesses sensor internal, its output form is just
It can not be changed through fixation.
Utility model content
The technical problem to be solved by the present invention is to provide a kind of built-in voltage electric current one transmitters, so that in 12-
In 36V Width funtion supply district, the purpose that standard voltage signal and standard current signal can export simultaneously is realized.
The technical solution of the utility model are as follows:
A kind of built-in voltage electric current one transmitter, include power input adjustment and voltage regulator circuit, it is defeated with power supply respectively
Enter the polarity inversion circuit and zero adjustment circuit of the output end connection of adjustment and voltage regulator circuit, and the electricity being made of four high guaily unit
Press signal amplification circuit and current signal conversion circuit；
The power input adjustment and voltage regulator circuit include primary power source input stabilizing circuit and second level adjustment pressure stabilizing
Circuit；
The primary power source input stabilizing circuit includes power supply chip U3, inductance L1, resistance R1, resistance R2 and pressure stabilizing
The input terminal of diode D2, the power supply chip U3 and the output end of supply voltage connect, one end, two pole of pressure stabilizing of inductance L1
The cathode of pipe D2 is connect with the output end of power supply chip U3, and one end of resistance R2 and the other end of inductance L1 are connected to level-one
The other end of the 12V voltage output end of power input voltage regulator circuit, resistance R2 is connect with one end of resistance R1, and resistance R1's is another
End, the positive of zener diode D2 are grounded；The second level adjustment voltage regulator circuit includes low pressure voltage stabilizing chip U2, and low pressure is steady
The input terminal of pressure chip U2 is connect with the 12V voltage output end of primary power source input stabilizing circuit, and low pressure voltage stabilizing chip U2's is defeated
Outlet is the 5V voltage output end that second level adjusts voltage regulator circuit；
The polarity inversion circuit includes phase inverter U4, electrolytic capacitor E7 and electrolytic capacitor E8, the VCC of phase inverter U4
Pin is connect with the 5V voltage output end of second level adjustment voltage regulator circuit, the CAP+ pin of phase inverter U4 and the anode of electrolytic capacitor E7
Connection, the CAP- pin of phase inverter U4 are connect with the cathode of electrolytic capacitor E7, and the GND pin of phase inverter U4 is with electrolytic capacitor E8's
Anode is grounded, and -5V the voltage that the VSS pin of phase inverter U4 and the cathode of electrolytic capacitor E8 are connected to polarity inversion circuit is defeated
Outlet；
The zero adjustment circuit includes adjustable resistance RP2, resistance R3 and resistance R4, one end of resistance R3 and second level
The 5V voltage output end connection of voltage regulator circuit is adjusted, one end ground connection of resistance R4, the other end of resistance R3 is with adjustable resistance RP2's
The connection of one fixing end, the other end of resistance R4 are connect with another fixing end of adjustable resistance RP2, the adjustable end of adjustable resistance RP2
It is connect with one of differential signal line WHITE of sensor；
The voltage signal amplifying circuit include operational amplifier U1A in four high guaily unit and operational amplifier U1D, with
And variable resistance RP1, resistance R8, resistance R16, resistance R17, resistance R18 and resistance R19, the operational amplifier U1D's is same
One of differential signal line WHITE connection of phase input terminal and sensor, the non-inverting input terminal of the operational amplifier U1A
It is connect with another differential signal line GREEN of sensor, a wherein fixing end of the variable resistance RP1, resistance R16
One end, resistance R19 one end connect with the inverting input terminal of operational amplifier U1D, one end of the resistance R8, resistance
One end of R17, one end of resistance R18 are connect with the inverting input terminal of operational amplifier U1A, the variable resistance RP1's
Another fixing end and adjustable end are connect with the other end of resistance R8, the other end ground connection of resistance R16, the other end of resistance R19,
The other end of resistance R18 is connect with the output end of operational amplifier U1D, and the other end of resistance R17 is with operational amplifier U1A's
Output end is connected to the output end of voltage signal amplifying circuit；
The current signal conversion circuit include operational amplifier U1B in four high guaily unit and operational amplifier U1C, with
And resistance R7, resistance R10, resistance R14, resistance R15, resistance R20 and diode D3, one end of the resistance R20 and voltage
The output end of signal amplification circuit connects, the non-inverting input terminal of operational amplifier U1B, resistance R15 one end with resistance R20's
Other end connection, the inverting input terminal and output end of operational amplifier U1C are connect with the other end of resistance R15, operation amplifier
The inverting input terminal of device U1B, one end of resistance R7 are connect with one end of resistance R14, the other end ground connection of resistance R14, operation
The output end of amplifier U1B, the other end of resistance R7 are connect with one end of resistance R10, and the other end and the operation of resistance R10 is put
The noninverting input of big device U1C is connect with the anode of diode D3, and the cathode of diode D3 is as current signal conversion circuit
Output end；
Operational amplifier U1A, operational amplifier U1B, operational amplifier U1C and operational amplifier in the four high guaily unit
The power supply electrode input end of U1D is connect with the 12V voltage output end of primary power source input stabilizing circuit, the operation in four high guaily unit
Amplifier U1A, operational amplifier U1B, operational amplifier U1C and operational amplifier U1D power supply negative input and polarity
- 5V the voltage output end of inverter cricuit connects.
The primary power source input stabilizing circuit further includes having electrolytic capacitor E1, electrolytic capacitor E2, capacitor C1, capacitor C2
With capacitor C3, the anode of electrolytic capacitor E1, one end of capacitor C1 are connect with the output end of supply voltage, the capacitor C2's
One end connects the feedback FB pin of power supply chip U3, and the other end of capacitor C2, the anode of electrolytic capacitor E2, one end of capacitor C3 are equal
It is connect with the other end of inductance L1, the cathode of electrolytic capacitor E1, the other end of capacitor C1, the cathode of electrolytic capacitor E2, capacitor C3
The other end be grounded.
The described second level adjustment voltage regulator circuit further includes having capacitor C5, capacitor C6, capacitor C7 and electrolytic capacitor E3, described
One end of capacitor C5 is connect with the 12V voltage output end of primary power source input stabilizing circuit, and the capacitor C6 is as bypass electricity
Hold, wherein one end is connect with the bypass Bypass pin of low pressure voltage stabilizing chip U2, anode, the electrolytic capacitor E3 of the capacitor C7
One end connect with the output end of low pressure voltage stabilizing chip U2, the other end of capacitor C5, the other end of capacitor C6, capacitor C7 it is another
The cathode of one end and electrolytic capacitor E3 are grounded.
The power supply chip U3 selects the power supply chip of model SP3001；The low pressure voltage stabilizing chip U2 is selected
The low pressure voltage stabilizing chip of the model LP2891-5.0 of SOT-25 encapsulation.
The phase inverter U4 selects the voltage inverter of model ICL7660.
The four high guaily unit selects the four road operational amplifiers of model OPA4277UA.
The advantages of the utility model:
(1), the power supply chip of high-performance Width funtion is used in the power input adjustment of the utility model and voltage regulator circuit, it is real
Having showed transmitter can the lossless purpose for exporting and working normally in 12-36V supply district；
(2), each circuit is carried out modularized design by the utility model, keeps circuit simple and reliable；
(3), utility model is adjusted using power input and voltage regulator circuit passes through two-stage pressure stabilizing, and output is more stable, can
Late-class circuit is effectively protected；
(4), the utility model takes careful design, mostly uses anti-interference device, strong antijamming capability；
(5), the voltage signal amplifying circuit of the utility model and the public four high guaily unit of current signal conversion circuit, operation
It is convenient；
(6), the utility model overall structure is small, small and beautiful, is convenient for built-in installation；
(7), the utility model versatility and replaceability are good, and adjusting range is wide, and performance is stablized, and production cost is low, is easy to
Batch production.
Detailed description of the invention
Fig. 1 is the structural block diagram of the utility model.
Fig. 2 is the circuit diagram of the utility model primary power source input stabilizing circuit.
Fig. 3 is the circuit diagram of the utility model second level adjustment voltage regulator circuit.
Fig. 4 is the circuit diagram of the utility model polarity inversion circuit.
Fig. 5 is the circuit diagram of the utility model zero adjustment circuit.
Fig. 6 is the circuit diagram of the utility model voltage signal amplifying circuit.
Fig. 7 is the circuit diagram of the utility model current signal conversion circuit.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
See Fig. 1, a kind of built-in voltage electric current one transmitter includes power input adjustment and voltage regulator circuit, respectively with
The polarity inversion circuit 2 and zero adjustment circuit 3 of power input adjustment and the output end connection of voltage regulator circuit 1, and by four fortune
Put the voltage signal amplifying circuit 4 and current signal conversion circuit 5 of composition；Power input adjustment and voltage regulator circuit 1 include one
Level power supply input stabilizing circuit 11 and second level adjust voltage regulator circuit 12.
See that Fig. 2, primary power source input stabilizing circuit 11 include the power supply chip U3 of model SP3001, inductance L1, electricity
Hinder R1, resistance R2, zener diode D2, electrolytic capacitor E1, electrolytic capacitor E2, capacitor C1, capacitor C2 and capacitor C3, power supply chip
Input terminal, that is, pin 7 and 8 of U3, the anode of electrolytic capacitor E1, capacitor C1 one end connect with the output end of supply voltage, electricity
The cathode of one end, zener diode D2 for feeling L1 is connect with output end, that is, pin of power supply chip U3 1 and 2, and the one of capacitor C2
The pin 4 of end connection power supply chip U3 feeds back FB pin, one end of resistance R2, the other end of capacitor C2, electrolytic capacitor E2
The one end positive, capacitor C3 is connected to the 12V voltage output of primary power source input stabilizing circuit with the other end of inductance L1
End, the other end of resistance R2 are connect with one end of resistance R1, the other end of resistance R1, the anode of zener diode D2, electrolysis electricity
Hold the pin 3,5 of the cathode of E1, the other end of capacitor C1, the cathode of electrolytic capacitor E2, the other end of capacitor C3, power supply chip U3
It is grounded with 6；Input power is carried out a pressure stabilizing by primary power source input stabilizing circuit, and output one is stable, anti-interference energy
The strong voltage of power, output size change according to the change in resistance of R1, R2., a pressure stabilizing result is (1+R2/R1) * 1.235V,
The utility model is adjusted in 12V or so；Since the voltage that pressure stabilizing of power supply obtains is excessive, it has not been convenient to be directly connected to operation amplifier
Device and sensor and other devices, thus secondary pressure is carried out to it.
See that Fig. 3, second level adjustment voltage regulator circuit 12 include the low pressure pressure stabilizing of the model LP2891-5.0 of SOT-25 encapsulation
Chip U2, capacitor C5, capacitor C6, capacitor C7 and electrolytic capacitor E3, input terminal, that is, pin 1 and 3, the capacitor of low pressure voltage stabilizing chip U2
One end of C5 is connect with the 12V voltage output end of primary power source input stabilizing circuit, capacitor C6 as shunt capacitance, wherein one
End bypasses Bypass pin with the pin 4 of low pressure voltage stabilizing chip U2 and connect, and the anode of capacitor C7, one end of electrolytic capacitor E3 are equal
The 5V voltage output end of second level adjustment voltage regulator circuit is connected to output end, that is, pin 5 of low pressure voltage stabilizing chip U2, low pressure is steady
The pin 2 for pressing chip U2 is grounding pin, the other end of capacitor C5, the other end of capacitor C6, the other end of capacitor C7 and electrolysis
The cathode of capacitor E3 is grounded；The low pressure voltage stabilizing chip U2 of the model LP2891-5.0 of SOT-25 encapsulation has small in size excellent
Point, convenient for assembling built-in transmitter.
See that Fig. 4, polarity inversion circuit 2 include the phase inverter U4, electrolytic capacitor E7 and electrolytic capacitor of model ICL7660
VCC pin, that is, pin 8 of E8, phase inverter U4 are connect with the 5V voltage output end of second level adjustment voltage regulator circuit, and phase inverter U4's draws
Foot 2 is that CAP+ pin is connect with the anode of electrolytic capacitor E7, and the pin 4 of phase inverter U4 i.e. CAP- pin is negative with electrolytic capacitor E7's
Pole connection, the pin 3 of phase inverter U4 are that the anode of GND pin and electrolytic capacitor E8 is grounded, and the pin 5 of phase inverter U4 is VSS
The cathode of pin and electrolytic capacitor E8 are connected to the -5V voltage output end of polarity inversion circuit；Operation is put in industrial environment
Big device can only single supply power supply, when the differential output signal that transmitter introduces sensor has positive inverted signal, isolated forward direction electricity
Source tends not to form reasonable output, commonly uses reverse voltage to increase the amplifying power of operational amplifier chip, the utility model
Using the polarity of voltage phase inverter of model ICL7660, as long as power supply is no more than 12V, cooperate the electrolysis electricity of two 10uF/10V
Hold E7 and E8, output backward voltage can be fast implemented.
See that Fig. 5, zero adjustment circuit 3 include adjustable resistance RP2, resistance R3 and resistance R4, one end of resistance R3 and two
The 5V voltage output end connection of grade adjustment voltage regulator circuit, one end ground connection of resistance R4, the other end and adjustable resistance RP2 of resistance R3
Fixing end connection, the other end of resistance R4 connect with another fixing end of adjustable resistance RP2, and adjustable resistance RP2's is adjustable
End is connect with one of differential signal line WHITE of sensor；The output signal of sensor is all differential signal, conventional voltage
The output signal of operational amplifier can not but accomplish that difference output, the utility model use an adjustable resistance RP2 and 2 definite values
The zero adjustment circuit of resistance R3 and R4 composition reasonably adjusts the output signal of sensor.
See Fig. 6, voltage signal amplifying circuit include operational amplifier U1A in four high guaily unit and operational amplifier U1D, with
And variable resistance RP1, resistance R8, resistance R16, resistance R17, resistance R18 and resistance R19, the homophase input of operational amplifier U1D
End is that pin 12 is connect with one of differential signal line WHITE of sensor, and the non-inverting input terminal of operational amplifier U1A is drawn
Foot 3 is connect with another differential signal line GREEN of sensor, and the one of a wherein fixing end of variable resistance RP1, resistance R16
It holds, one end of resistance R19 is connect with inverting input terminal, that is, pin 13 of operational amplifier U1D, one end of resistance R8, resistance
One end of R17, one end of resistance R18 are connect with inverting input terminal, that is, pin 2 of operational amplifier U1A, variable resistance RP1's
Another fixing end and adjustable end are connect with the other end of resistance R8, the other end ground connection of resistance R16, the other end of resistance R19,
The other end of resistance R18 is connect with output end, that is, pin 14 of operational amplifier U1D, and the other end and the operation of resistance R17 is put
Output end, that is, pin 1 of big device U1A is connected to the output end of voltage signal amplifying circuit；
See Fig. 6, it is empty short according to amplifier and resolution has: formula 1. I2+I13=I16；
Formula 2. I2+I5=I16；
Assuming that R8+RP1=RG:
1. had according to formula
2. had according to formula
Because of R16=R17=R18=R19, formula 3.+4.:
It arranges:
It finally obtains
Again because the current potential of V2 and V13 is identical as the current potential of two signal wires GREEN and WHITE of sensor, V2-
V13 is exactly the output signal of sensor, thus, we conclude that:
As it can be seen that the amplification factor of sensor is definite value, multiple is
Above-mentioned I2 is the negative-phase sequence curent value of the pin 2 of operational amplifier U1A, and I13 is the pin 13 of operational amplifier U1D
Negative-phase sequence curent value, I5 is the current value for flowing through resistance R18, and I16 is the current value for flowing through resistance R16, and V2 is operational amplifier
The inverting input terminal voltage of the pin 2 of U1A, V13 are the inverting input terminal voltage of the pin 13 of operational amplifier U1D, and V14 is fortune
The output end voltage of the pin 14 of amplifier U1D is calculated, VOUT is the output voltage of voltage signal amplifying circuit.
See Fig. 7, current signal conversion circuit include operational amplifier U1B in four high guaily unit and operational amplifier U1C, with
And resistance R7, resistance R10, resistance R14, resistance R15, resistance R20 and diode D3, one end and the voltage signal of resistance R20 are put
The output end connection of big circuit, non-inverting input terminal, that is, pin 5 of operational amplifier U1B, resistance R15 one end with resistance R20
Other end connection, operational amplifier U1B, resistance R7 and resistance R14 form a basic see-saw circuit, operational amplifier
U1C, resistance R15 and resistance R20 form voltage follower circuit, inverting input terminal, that is, pin 9 of operational amplifier U1C and output
End is that pin 8 is connect with the other end of resistance R15, the one of inverting input terminal, that is, pin 6 of operational amplifier U1B, resistance R7
End is connect with one end of resistance R14, the other end ground connection of resistance R14, output end, that is, pin 7, the resistance of operational amplifier U1B
The other end of R7 is connect with one end of resistance R10, and the noninverting input of the other end and operational amplifier U1C of resistance R10 is
Pin 10 is connect with the anode of diode D3, output end of the cathode of diode D3 as current signal conversion circuit；
See Fig. 7, in voltage follower circuit, I20=I15 is releasedDue to VC=VD,
R20=R15 is derived by
In inverting amplifier circuit, I14=I7 is releasedDue to VA=V6, R14=R7, i.e.,
It is derived by
It 5. and is 6. obtained according to formula:
And because
8. can be seen that entire wiring board from formula is the voltage-controlled electric current processed of electricity consumption, reach voltage and current and meanwhile output
Purpose.
Above-mentioned I20 is the current value for flowing through resistance R20, and I15 is the current value for flowing through resistance R15, and I14 is to flow through resistance
The current value of R14, I7 are the current value for flowing through resistance R7, and VC is output voltage, that is, operational amplifier of current signal conversion circuit
The non-inverting input terminal voltage of U1C, VD are the output end voltage of operational amplifier U1C, and VA is the homophase input of operational amplifier U1B
Voltage is held, VB is the output end voltage of operational amplifier U1B.
Operational amplifier U1A's, operational amplifier U1B, operational amplifier U1C and operational amplifier U1D in four high guaily unit
Power supply electrode input end is connect with the 12V voltage output end of primary power source input stabilizing circuit, the operation amplifier in four high guaily unit
Device U1A, operational amplifier U1B, operational amplifier U1C and operational amplifier U1D power supply negative input and polarity inversion
- 5V the voltage output end of circuit connects.
Conventional transmitter amplification efficiency less stable, and price is also higher, in strong some environment of some interference,
The output signal of amplifier can not be correctly collected, along with amplifier power consumption itself is unstable, so transmitter built in routine
Precision is less high, it may appear that temperature drift, the four high guaily unit of the utility model select the four road operational amplifiers of model OPA4277UA
Realize sensor signal amplification output, OPA4277UA four high guaily unit is in the high-operational amplifier OP277 series that BB company, the U.S. releases
Four-way kind, improve noise, output and provides 2 times with the quiescent current of half at crest voltage fan-out capability characteristic
Speed, and oneself power consumption is lower, and only 2mA, drift value is smaller, also has extremely low input offset voltage, low input biasing
The advantages of electric current, high common-mode rejection ratio and power supply rejection ratio, channel version consistency.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (6)
1. a kind of built-in voltage electric current one transmitter, it is characterised in that: include power input adjustment and voltage regulator circuit, difference
The polarity inversion circuit and zero adjustment circuit being connect with the output end of power input adjustment and voltage regulator circuit, and by four high guaily unit
The voltage signal amplifying circuit and current signal conversion circuit of composition；
The power input adjustment and voltage regulator circuit include primary power source input stabilizing circuit and second level adjustment voltage regulator circuit；
The primary power source input stabilizing circuit includes power supply chip U3, inductance L1, two pole resistance R1, resistance R2 and pressure stabilizing
The input terminal of pipe D2, the power supply chip U3 and the output end of supply voltage connect, one end of inductance L1, zener diode D2
Cathode connect with the output end of power supply chip U3, one end of resistance R2 and the other end of inductance L1 are connected to primary power source
The other end of the 12V voltage output end of input stabilizing circuit, resistance R2 is connect with one end of resistance R1, the other end of resistance R1,
The anode of zener diode D2 is grounded；The second level adjustment voltage regulator circuit includes low pressure voltage stabilizing chip U2, low pressure pressure stabilizing
The input terminal of chip U2 is connect with the 12V voltage output end of primary power source input stabilizing circuit, the output of low pressure voltage stabilizing chip U2
End is the 5V voltage output end that second level adjusts voltage regulator circuit；
The polarity inversion circuit includes phase inverter U4, electrolytic capacitor E7 and electrolytic capacitor E8, the VCC pin of phase inverter U4
It is connect with the 5V voltage output end of second level adjustment voltage regulator circuit, the CAP+ pin of phase inverter U4 and the anode of electrolytic capacitor E7 connect
It connects, the CAP- pin of phase inverter U4 is connect with the cathode of electrolytic capacitor E7, and the GND pin and electrolytic capacitor E8 of phase inverter U4 is just
It is extremely grounded, the VSS pin of phase inverter U4 is connected to the -5V voltage output of polarity inversion circuit with the cathode of electrolytic capacitor E8
End；
The zero adjustment circuit includes adjustable resistance RP2, resistance R3 and resistance R4, and one end of resistance R3 and second level adjust
The 5V voltage output end of voltage regulator circuit connects, and one end ground connection of resistance R4, the other end of resistance R3 and the one of adjustable resistance RP2 consolidate
Fixed end connection, the other end of resistance R4 are connect with another fixing end of adjustable resistance RP2, the adjustable end of adjustable resistance RP2 and biography
One of differential signal line WHITE connection of sensor；
The voltage signal amplifying circuit includes operational amplifier U1A and operational amplifier U1D, Yi Jike in four high guaily unit
Power transformation hinders RP1, resistance R8, resistance R16, resistance R17, resistance R18 and resistance R19, and the operational amplifier U1D's is same mutually defeated
Enter one of differential signal line WHITE connection of end and sensor, the non-inverting input terminal and biography of the operational amplifier U1A
Another differential signal line GREEN connection of sensor, the one of a wherein fixing end of the variable resistance RP1, resistance R16
It holds, one end of resistance R19 is connect with the inverting input terminal of operational amplifier U1D, one end of the resistance R8, resistance R17
One end, resistance R18 one end connect with the inverting input terminal of operational amplifier U1A, the variable resistance RP1's is another
Fixing end and adjustable end are connect with the other end of resistance R8, the other end ground connection of resistance R16, the other end, the resistance of resistance R19
The other end of R18 is connect with the output end of operational amplifier U1D, the output of the other end and operational amplifier U1A of resistance R17
End is connected to the output end of voltage signal amplifying circuit；
The current signal conversion circuit includes operational amplifier U1B and operational amplifier U1C, Yi Ji electricity in four high guaily unit
Hinder R7, resistance R10, resistance R14, resistance R15, resistance R20 and diode D3, one end of the resistance R20 and voltage signal
The output end of amplifying circuit connects, and the non-inverting input terminal of operational amplifier U1B, one end of resistance R15 are another with resistance R20
End connection, the inverting input terminal and output end of operational amplifier U1C are connect with the other end of resistance R15, operational amplifier U1B
Inverting input terminal, resistance R7 one end connect with one end of resistance R14, the other end of resistance R14 ground connection, operational amplifier
The output end of U1B, the other end of resistance R7 are connect with one end of resistance R10, the other end and operational amplifier of resistance R10
The noninverting input of U1C is connect with the anode of diode D3, and the cathode of diode D3 is as the defeated of current signal conversion circuit
Outlet；
Operational amplifier U1A, operational amplifier U1B, operational amplifier U1C and operational amplifier U1D in the four high guaily unit
Power supply electrode input end connect with the 12V voltage output end of primary power source input stabilizing circuit, the operation in four high guaily unit is put
The power supply negative input of device U1A, operational amplifier U1B, operational amplifier U1C and operational amplifier U1D greatly are anti-with polarity
- 5V the voltage output end of circuitry phase connects.
2. a kind of built-in voltage electric current one transmitter according to claim 1, it is characterised in that: the primary power source
Input stabilizing circuit further includes having electrolytic capacitor E1, electrolytic capacitor E2, capacitor C1, capacitor C2 and capacitor C3, electrolytic capacitor E1's
The one end positive, capacitor C1 is connect with the output end of supply voltage, one end connection power supply chip U3's of the capacitor C2
Feed back FB pin, the other end of capacitor C2, the anode of electrolytic capacitor E2, capacitor C3 one end with the other end of inductance L1 connect
Connect, the cathode of electrolytic capacitor E1, the other end of capacitor C1, the cathode of electrolytic capacitor E2, capacitor C3 the other end be grounded.
3. a kind of built-in voltage electric current one transmitter according to claim 1, it is characterised in that: the second level adjustment
Voltage regulator circuit further includes having capacitor C5, capacitor C6, capacitor C7 and electrolytic capacitor E3, one end of the capacitor C5 and primary power source
The 12V voltage output end of input stabilizing circuit connects, the capacitor C6 as shunt capacitance, wherein one end and low pressure pressure stabilizing core
The bypass Bypass pin of piece U2 connects, the anode of the capacitor C7, electrolytic capacitor E3 one end with low pressure voltage stabilizing chip
The output end of U2 connects, the other end of capacitor C5, the other end of capacitor C6, the other end of capacitor C7 and electrolytic capacitor E3 cathode
It is grounded.
4. a kind of built-in voltage electric current one transmitter according to claim 1, it is characterised in that: the power supply chip
The power supply chip of U3 selection model SP3001；The low pressure voltage stabilizing chip U2 selects the model of SOT-25 encapsulation
The low pressure voltage stabilizing chip of LP2891-5.0.
5. a kind of built-in voltage electric current one transmitter according to claim 1, it is characterised in that: the phase inverter U4
Select the voltage inverter of model ICL7660.
6. a kind of built-in voltage electric current one transmitter according to claim 1, it is characterised in that: the four high guaily unit choosing
With the four road operational amplifiers of model OPA4277UA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821258740.5U CN209247858U (en) | 2018-08-06 | 2018-08-06 | A kind of built-in voltage electric current one transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821258740.5U CN209247858U (en) | 2018-08-06 | 2018-08-06 | A kind of built-in voltage electric current one transmitter |
Publications (1)
| Publication Number | Publication Date |
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| CN209247858U true CN209247858U (en) | 2019-08-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821258740.5U Expired - Fee Related CN209247858U (en) | 2018-08-06 | 2018-08-06 | A kind of built-in voltage electric current one transmitter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109030901A (en) * | 2018-08-06 | 2018-12-18 | 安徽天光传感器有限公司 | A kind of built-in voltage electric current one transmitter |
-
2018
- 2018-08-06 CN CN201821258740.5U patent/CN209247858U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109030901A (en) * | 2018-08-06 | 2018-12-18 | 安徽天光传感器有限公司 | A kind of built-in voltage electric current one transmitter |
| CN109030901B (en) * | 2018-08-06 | 2023-09-26 | 安徽天光传感器有限公司 | Built-in voltage and current integrated transmitter |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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| CF01 | Termination of patent right due to non-payment of annual fee |