CN107979342A - The electromagnetic interference compensation circuit of integrated circuit - Google Patents
The electromagnetic interference compensation circuit of integrated circuit Download PDFInfo
- Publication number
- CN107979342A CN107979342A CN201711178421.3A CN201711178421A CN107979342A CN 107979342 A CN107979342 A CN 107979342A CN 201711178421 A CN201711178421 A CN 201711178421A CN 107979342 A CN107979342 A CN 107979342A
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- triode
- circuit
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- transport
- placing device
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C1/00—Amplitude modulation
- H03C1/36—Amplitude modulation by means of semiconductor device having at least three electrodes
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Abstract
The invention discloses the electromagnetic interference compensation circuit of integrated circuit, including on-off circuit, operational amplifier circuit and compensation circuit, the on-off circuit receives the input signal of integrated circuit signal transmission channel, compound circuit amplitude modulation is formed using triode Q1 Q3, then transport and placing device AR1 is utilized by operational amplifier circuit, in AR2 amplified signal input offset circuits, the driving compensation circuit work of transport and placing device AR2 amplified signals is devised at the same time, compensation circuit is switched and exported after resistance R8 partial pressures in order to control using triode Q5, it that is to say in input ic signal transmission passage, reach the effect of the electromagnetic interference compensation of integrated circuit.
Description
Technical field
The present invention relates to technical field of integrated circuits, more particularly to the electromagnetic interference compensation circuit of integrated circuit.
Background technology
Integrated circuit is seen everywhere in people's lives, is electronic equipment hardcore, is changed the life of people significantly
Living, concurrently research of the people to integrated circuit was also never interrupted, and wherein electromagnetic interference is one of integrated circuit obvious
Defect, electromagnetic interference can disturb the use of integrated circuit, when integrated circuit using when be subject to electromagnetic interference, its signal transmission passage
Signal amplitude mutation can occur, integrated circuit is not used, or even when signal amplitude is too low, the electrostatic of generation can damage
Integrated circuit, causes unpredictable loss.
So the present invention provides a kind of new scheme to solve the problems, such as this.
The content of the invention
For the above situation, to overcome the defect of the prior art, the purpose of the present invention is the electromagnetism for providing integrated circuit
Interference compensation circuit, have be skillfully constructed, the characteristic of human oriented design, efficiently solve when existing integrated circuit uses by
To electromagnetic interference, the signal amplitude of its signal transmission passage can occur mutation, integrated circuit is not used, or even when signal shakes
When too low, the problem of electrostatic of generation can damage integrated circuit.
Its solve technical solution be the electromagnetic interference compensation circuit of integrated circuit, including on-off circuit, operational amplifier circuit and
Compensation circuit, the on-off circuit receive the input signal of integrated circuit signal transmission channel, are formed using triode Q1-Q3 multiple
Circuit amplitude modulation is closed, is then utilized by operational amplifier circuit in transport and placing device AR1, AR2 amplified signal input offset circuit, while devise fortune
The driving compensation circuit work of device AR2 amplified signals is put, compensation circuit is switched after resistance R8 partial pressures in order to control using triode Q5
Output, that is to say in input ic signal transmission passage；
The on-off circuit includes triode Q1, one end of the base stage connecting resistance R2 of triode Q1, the other end of resistance R2
One end of connecting resistance R1 and signal input port, the emitter of triode Q1 connect one end of capacitance C1 and the base stage of triode Q3,
One end of the collector connecting resistance R3 of triode Q1, another unit of resistance R3 connect power supply+5V, three pole of another termination of capacitance C1
The base stage of pipe Q2, the other end of the collector connecting resistance R1 of triode Q2, the emitter of triode Q2 connect inductance L1 one end and
One end of capacitance C2, one end of another terminating resistor R4 of capacitance C2, the other end ground connection of resistance R4, the collector of triode Q3
Connect the other end of inductance L1.
Preferably, the operational amplifier circuit includes transport and placing device AR1, the hair of the homophase input termination triode Q3 of transport and placing device AR1
Emitter-base bandgap grading, the emitter of the anti-phase input termination triode Q4 of transport and placing device AR1, the base stage of triode Q4 connect the current collection of triode Q3
Pole, one end of collector connecting resistance R5 of triode Q4 and the in-phase input end of transport and placing device AR2, another termination power of resistance R5
One end of the anti-phase input terminating resistor R9 of+10V, transport and placing device AR2, the output terminal of another termination transport and placing device AR2 of resistance R9 and
One end of resistance R10, the in-phase input end of the output termination transport and placing device AR3 of transport and placing device AR1, the inverting input of transport and placing device AR3
Ground connection, one end of the output terminating resistor R6 of transport and placing device AR3.
Due to the use of above technical scheme, the present invention has the following advantages that compared with prior art；
1, the amplitude for the input signal for filtering off integrated circuit signal transmission channel with the conducting voltage of triode Q1 is relatively low
Signal, that is to say interference signal, the transmitting electrode potential of triode Q1 is the control electrode potential of triode Q3, Q2, while capacitance
C1 plays filter action, and the transmitting electrode potential of triode Q2 is the current collection of triode Q3 after inductance L1 and capacitance C2 parallel filterings
Electrode potential, therefore triode Q2 can reduce the current potential in the input signal of integrated circuit signal transmission channel, while through inductance
L1 and capacitance C2 parallel filterings can provide the collector potential of stabilization for triode Q3 again, and the conducting voltage of triode Q3 can at this time
To be set to low-potential signal in the input signal of integrated circuit signal transmission channel, therefore triode Q1-Q3 composition compound circuits
Play the role of cutting peak, reach the effect of amplitude modulation.
2, when the signal of on-off circuit input is normal, transport and placing device AR2 output low level current potentials, triode Q5 is not turned on, this
When transport and placing device AR3 output signal exported after resistance R6, R8 connect partial pressure, that is to say input ic signal transmission passage
It is interior；The signal of on-off circuit input is abnormal, when that is to say that the signal amplitude of signal transmission passage is too low, transport and placing device AR2 at this time
In-phase input end become larger, therefore transport and placing device AR2 output high level signal, triode Q5 conducting, compensation circuit work, power supply+
10V is flowed into integrated circuit signal transmission channel after resistance R7 partial pressures through resistance R8, and the electromagnetic interference for reaching integrated circuit is mended
The effect repaid.
Brief description of the drawings
Fig. 1 is the circuit diagram of the electromagnetic interference compensation circuit of integrated circuit of the present invention.
Fig. 2 is the circuit diagram of the electromagnetic interference compensation circuit of integrated circuit of the present invention.
Embodiment
For the present invention foregoing and other technology contents, feature and effect, in following cooperation with reference to figures 1 through attached drawing 2
To in the detailed description of embodiment, can clearly present.The structure content being previously mentioned in following embodiments, is with specification
Attached drawing is reference.
Embodiment one, the electromagnetic interference compensation circuit of integrated circuit, including on-off circuit, operational amplifier circuit and compensation circuit,
The on-off circuit receives the input signal of integrated circuit signal transmission channel, and compound circuit tune is formed using triode Q1-Q3
Width, is then utilized in transport and placing device AR1, AR2 amplified signal input offset circuit by operational amplifier circuit, while devises transport and placing device AR2
Amplified signal driving compensation circuit work, compensation circuit are switched and exported after resistance R8 partial pressures in order to control using triode Q5,
It is in input ic signal transmission passage；
The on-off circuit filters off the input signal of integrated circuit signal transmission channel with the conducting voltage of triode Q1
The relatively low signal of amplitude, that is to say interference signal, the transmitting electrode potential of triode Q1 is the control pole electricity of triode Q3, Q2
Position, while capacitance C1 plays filter action, the transmitting electrode potential of triode Q2 is three after inductance L1 and capacitance C2 parallel filterings
The collector potential of pole pipe Q3, therefore triode Q2 can reduce the electricity in the input signal of integrated circuit signal transmission channel
Position, while stable collector potential can be provided through inductance L1 and capacitance C2 parallel filterings for triode Q3 again, at this time triode
The conducting voltage of Q3 can be set to low-potential signal in the input signal of integrated circuit signal transmission channel, therefore triode Q1-
Q3 composition compound circuits play the role of cutting peak, reach the effect of amplitude modulation, one end of the base stage connecting resistance R2 of triode Q1, resistance
One end of another terminating resistor R1 of R2 and signal input port, the emitter of triode Q1 connect one end and the triode of capacitance C1
The base stage of Q3, one end of the collector connecting resistance R3 of triode Q1, another unit of resistance R3 meet power supply+5V, and capacitance C1's is another
The base stage of one termination triode Q2, the other end of the collector connecting resistance R1 of triode Q2, the emitter of triode Q2 connect inductance
One end of L1 and one end of capacitance C2, one end of another terminating resistor R4 of capacitance C2, the other end ground connection of resistance R4, triode
The collector of Q3 connects the other end of inductance L1.
Embodiment two, on the basis of embodiment one, the operational amplifier circuit uses transport and placing device AR1, AR3 amplification switch circuit
The signal of input, when triode Q1 is turned on, the in-phase input end of transport and placing device AR1 receives the signal of on-off circuit input, if
The signal of on-off circuit input at this time is normal, and triode Q4 conductings, power supply+10V separately flows into transport and placing device after resistance R5 partial pressures
The in-phase input end of AR2 and flowed into after the decompression of triode Q4 direct impedances in the inverting input of transport and placing device AR1, this luck
Put device AR2 output low level current potentials, it is impossible to compensation circuit is worked, if the signal of on-off circuit input at this time is abnormal,
Be signal transmission passage signal amplitude it is too low when, triode Q4 is not turned on, at this time transport and placing device AR2 in-phase input end become
Greatly, therefore transport and placing device AR2 output high level signals, compensation circuit work, the homophase input of transport and placing device AR1 terminate triode Q3's
Emitter, the emitter of the anti-phase input termination triode Q4 of transport and placing device AR1, the base stage of triode Q4 connect the current collection of triode Q3
Pole, one end of collector connecting resistance R5 of triode Q4 and the in-phase input end of transport and placing device AR2, another termination power of resistance R5
One end of the anti-phase input terminating resistor R9 of+10V, transport and placing device AR2, the output terminal of another termination transport and placing device AR2 of resistance R9 and
One end of resistance R10, the in-phase input end of the output termination transport and placing device AR3 of transport and placing device AR1, the inverting input of transport and placing device AR3
Ground connection, one end of the output terminating resistor R6 of transport and placing device AR3.
Embodiment three, on the basis of embodiment two, when the signal of on-off circuit input is normal, transport and placing device AR2 outputs are low
Level potential, triode Q5 are not turned on, and the signal of transport and placing device AR3 outputs at this time exports after resistance R6, R8 connect partial pressure, namely
It is in input ic signal transmission passage；The signal of on-off circuit input is abnormal, that is to say the letter of signal transmission passage
When number amplitude is too low, the in-phase input end of transport and placing device AR2 becomes larger at this time, therefore transport and placing device AR2 output high level signals, three poles
Pipe Q5 is turned on, and compensation circuit work, power supply+10V flows into integrated circuit signal transmission channel after resistance R7 partial pressures through resistance R8
It is interior, reach the effect of the electromagnetic interference compensation of integrated circuit, the other end of the base stage connecting resistance R10 of triode Q5, triode Q5
Collector connecting resistance R7 one end, the other end of the emitter connecting resistance R6 of another termination+10V of resistance R7, triode Q5
With one end of resistance R8, another termination signal output port of resistance R8.
Present invention tool is in use, the electromagnetic interference compensation circuit of integrated circuit, including on-off circuit, operational amplifier circuit and compensation
Circuit, the on-off circuit receive the input signal of integrated circuit signal transmission channel, and compound electric is formed using triode Q1-Q3
Road amplitude modulation, is then utilized in transport and placing device AR1, AR2 amplified signal input offset circuit by operational amplifier circuit, while devises transport and placing device
The driving compensation circuit work of AR2 amplified signals, compensation circuit are switched and exported after resistance R8 partial pressures in order to control using triode Q5,
It that is to say in input ic signal transmission passage；The on-off circuit filters off integrated electricity with the conducting voltage of triode Q1
The relatively low signal of the amplitude of the input signal of road signal transmission passage, that is to say interference signal, the transmitting electrode potential of triode Q1
For the control electrode potential of triode Q3, Q2, while capacitance C1 plays filter action, and the transmitting electrode potential of triode Q2 is through inductance L1
With after capacitance C2 parallel filterings be triode Q3 collector potential, therefore triode Q2 can reduce integrated circuit signal transmission
Current potential in the input signal of passage, while stable collection can be provided for triode Q3 again through inductance L1 and capacitance C2 parallel filterings
Electrode potential, at this time the conducting voltage of triode Q3 can be set to low potential in the input signal of integrated circuit signal transmission channel
Signal, therefore triode Q1-Q3 composition compound circuits play the role of cutting peak, reach the effect of amplitude modulation, the operational amplifier circuit fortune
The signal inputted with transport and placing device AR1, AR3 amplification switch circuit, when triode Q1 is turned on, the in-phase input end of transport and placing device AR1
The signal of on-off circuit input is received, if the signal of on-off circuit input at this time is normal, triode Q4 conductings, power supply+10V warps
The in-phase input end of transport and placing device AR2 is separately flowed into after resistance R5 partial pressures and flows into amplifier after the decompression of triode Q4 direct impedances
In the inverting input of device AR1, transport and placing device AR2 exports low level current potential at this time, it is impossible to compensation circuit is worked, if opened at this time
The signal of powered-down road input is abnormal, and when that is to say that the signal amplitude of signal transmission passage is too low, triode Q4 is not turned on, at this time
The in-phase input end of transport and placing device AR2 becomes larger, therefore transport and placing device AR2 output high level signals, compensation circuit work, on-off circuit are defeated
When the signal entered is normal, transport and placing device AR2 output low level current potentials, triode Q5 is not turned on, the signal of transport and placing device AR3 outputs at this time
Export, that is to say in input ic signal transmission passage after resistance R6, R8 connect partial pressure；The signal of on-off circuit input
It is abnormal, when that is to say that the signal amplitude of signal transmission passage is too low, the in-phase input end of transport and placing device AR2 becomes larger at this time, therefore
Transport and placing device AR2 exports high level signal, and triode Q5 conductings, compensation circuit work, power supply+10V is after resistance R7 partial pressures through electricity
Hinder R8 to flow into integrated circuit signal transmission channel, reach the effect of the electromagnetic interference compensation of integrated circuit.
The above is to combine embodiment further description made for the present invention, it is impossible to assert the present invention
Specific implementation is limited only to this；For belonging to the present invention and for those skilled in the technology concerned, based on skill of the present invention
Under the premise of art scheme thinking, the expansion made and operating method, the replacement of data, should all fall the scope of the present invention it
It is interior.
Claims (3)
1. the electromagnetic interference compensation circuit of integrated circuit, including on-off circuit, operational amplifier circuit and compensation circuit, it is characterised in that
The on-off circuit receives the input signal of integrated circuit signal transmission channel, and compound circuit tune is formed using triode Q1-Q3
Width, is then utilized in transport and placing device AR1, AR2 amplified signal input offset circuit by operational amplifier circuit, while devises transport and placing device AR2
Amplified signal driving compensation circuit work, compensation circuit are switched and exported after resistance R8 partial pressures in order to control using triode Q5,
It is in input ic signal transmission passage；
The on-off circuit includes triode Q1, one end of the base stage connecting resistance R2 of triode Q1, another termination electricity of resistance R2
The one end and signal input port, the emitter of triode Q1 for hindering R1 connect one end of capacitance C1 and the base stage of triode Q3, three poles
One end of the collector connecting resistance R3 of pipe Q1, another unit of resistance R3 meet power supply+5V, another termination triode Q2 of capacitance C1
Base stage, the other end of the collector connecting resistance R1 of triode Q2, the emitter of triode Q2 connects one end and the capacitance of inductance L1
One end of C2, one end of another terminating resistor R4 of capacitance C2, the other end ground connection of resistance R4, the collector of triode Q3 connect electricity
Feel the other end of L1.
2. the electromagnetic interference compensation circuit of integrated circuit as claimed in claim 1, it is characterised in that the operational amplifier circuit includes fortune
Put device AR1, the emitter of the homophase input termination triode Q3 of transport and placing device AR1, the anti-phase input termination triode of transport and placing device AR1
The emitter of Q4, the base stage of triode Q4 connect the collector of triode Q3, one end of the collector connecting resistance R5 of triode Q4 and
The in-phase input end of transport and placing device AR2, the anti-phase input terminating resistor R9 of another termination power+10V of resistance R5, transport and placing device AR2
One end, the output terminal of another termination transport and placing device AR2 of resistance R9 and one end of resistance R10, the output termination fortune of transport and placing device AR1
Put the in-phase input end of device AR3, the reverse inter-input-ing ending grounding of transport and placing device AR3, the one of the output terminating resistor R6 of transport and placing device AR3
End.
3. the electromagnetic interference compensation circuit of integrated circuit as claimed in claim 2, it is characterised in that the compensation circuit includes three
The other end of the base stage connecting resistance R10 of pole pipe Q5, triode Q5, one end of the collector connecting resistance R7 of triode Q5, resistance R7
Another termination+10V, the other end of emitter connecting resistance R6 of triode Q5 and one end of resistance R8, the other end of resistance R8
Connect signal output port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711178421.3A CN107979342A (en) | 2017-11-23 | 2017-11-23 | The electromagnetic interference compensation circuit of integrated circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711178421.3A CN107979342A (en) | 2017-11-23 | 2017-11-23 | The electromagnetic interference compensation circuit of integrated circuit |
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| Publication Number | Publication Date |
|---|---|
| CN107979342A true CN107979342A (en) | 2018-05-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711178421.3A Pending CN107979342A (en) | 2017-11-23 | 2017-11-23 | The electromagnetic interference compensation circuit of integrated circuit |
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| CN (1) | CN107979342A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109285295A (en) * | 2018-09-10 | 2019-01-29 | 河南元祖信息技术有限公司 | Real estate payment and certificate issuing integrated equipment intelligent terminal system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109285295A (en) * | 2018-09-10 | 2019-01-29 | 河南元祖信息技术有限公司 | Real estate payment and certificate issuing integrated equipment intelligent terminal system |
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Application publication date: 20180501 |