CN206251103U - A kind of signal protection circuit and device - Google Patents
A kind of signal protection circuit and device Download PDFInfo
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- CN206251103U CN206251103U CN201621358485.2U CN201621358485U CN206251103U CN 206251103 U CN206251103 U CN 206251103U CN 201621358485 U CN201621358485 U CN 201621358485U CN 206251103 U CN206251103 U CN 206251103U
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Abstract
The utility model discloses a kind of signal electrical source protecting equipment for electromagnetic compatibility anti-interference test, it is characterised in that including：Shell and circuit board, the circuit board are provided with Signal Matching NE, unidirectional phototube coupling unit and control driver element；The signal source input signal sequentially passes through after Signal Matching NE, unidirectional phototube coupling unit and control driver element are processed output to being devices under.The utility model can reduce interference of the anti-interference test to signal source in itself, it is ensured that the stability of control signal in anti-interference process of the test, reduce and occur the erroneous judgement of anomaly in test process.
Description
Technical field
The utility model is related to electromagnetic compatibility anti-interference to protect field, more particularly to a kind of signal protection circuit and device.
Background technology
With the development of electronic information and intellectualized technology, people require also more and more higher to the comfort level of vehicle, therefore
Corresponding electronic equipment is also more and more, and electrical system becomes increasingly complex.While vehicle electronics reliability on the other side,
EMC Requirements degree is also more and more harsher.
Vehicle electronic device electromagnetic compatibility anti-interference test can all use Bulk current injection method at present, and (BC is to vehicle electronic device
The antijamming capability of coupled interference examined.When some vehicle electronic devices are test for, electronic equipment needs to receive
Under predetermined function, such as signal steering indicating light needs to receive and necessarily accounts for the various control signals ability normal work that test equipment is provided
The square-wave signal of empty ratio.But Bulk current injection method experiment (BCI) needs to carry out anti-interference test to holding wire, disturbed during experiment
Signal is coupled on holding wire, and interference signal is transferred on the signal source port for providing control signal by holding wire, so that shadow
Ring to signal source work.When being tested, if being devices under work there is anomaly, may failure judgement show
As if caused by the equipment under test still abnormal work of signal source itself that circuit causes in itself.
Utility model content
In order to overcome the deficiencies in the prior art, the purpose of this utility model is to provide a kind of signal protection circuit and dress
Put, it can reduce interference of the anti-interference test to signal source in itself, it is ensured that the stability of control signal in anti-interference process of the test, reduce
Occurs the erroneous judgement of anomaly in test process.
The purpose of this utility model is realized using following technical scheme：
A kind of signal protection circuit, it is characterised in that including：
Signal Matching NE, carries out resonance and matches and amplify for the input signal to different frequency；
Unidirectional phototube coupling unit, signal for the amplification of linear transfer Signal Matching NE output and to interference
Signal carries out isolation to be prevented from being coupled to signal source；
And control driver element, the signal for amplifying unidirectional phototube coupling unit output；
The Signal Matching NE, unidirectional phototube coupling unit and control driver element are sequentially connected electrically；It is described
Signal source input signal sequentially passes through Signal Matching NE and carries out resonance amplification, and unidirectional Phototube Coupling unit wires sexual isolation is passed
It is defeated, control driver element control enhanced processing output.
Preferably, the Signal Matching NE includes resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, electricity
Hold C1, electric capacity C2, electric capacity C3, variable capacitance CB1, variable capacitance CB2, inductance L1, triode Q1, triode Q2 and power supply
VDD；The colelctor electrode of triode Q1 is connected by series resistor R4 with power vd D, and the colelctor electrode of triode Q1 is also gone here and there by order
Connection variable capacitance CB1, inductance L1 are connected with the base stage of triode Q2；The base series resistor R1 connecting signal sources of triode Q1
First end；The emitter stage of triode Q1 is connected to the second end of signal source with the emitter stage of triode Q2；Electric capacity C1 and resistance R2
It is parallel between the base stage of triode Q1 and emitter stage, electric capacity C2 and resistance R3 is parallel to the collector and emitter of triode Q1
Between；Variable capacitance CB2 one end and inductance L1, the Node connectedness of variable capacitance CB1, the other end connect with the emitter stage of triode Q2
Connect；The colelctor electrode of triode Q2 is connected by series resistor R5 with power vd D, and the colelctor electrode of triode Q2 also passes through serial capacitance
C3 is connected with unidirectional phototube coupling unit.
Preferably, the unidirectional phototube coupling unit includes chip U1, and it has four pins；First pin connects signal
The output end of matching network unit, the second end of second pin connecting signal source, the 3rd pin, the connection control of the 4th pin drive
Unit.
Preferably, the control driver element includes resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, electric capacity
C10, diode D1, diode D2, diode D3, diode D4, voltage-stabiliser tube D5 and triode Q3；The base stage of triode Q3 is led to
Series resistor R7 is crossed to be connected with the 4th pin of the chip U4 in phototube coupling unit；The emitter stage of triode Q3 is by concatenating electricity
Resistance R6 is connected with the 4th pin of chip U4, and the emitter stage of triode Q3 is also connected with diode D1, the negative electrode of diode D2；Three poles
3rd pin of the colelctor electrode connection chip U1 of pipe Q3, the colelctor electrode of triode Q3 is also connected with diode D3, the sun of diode D4
Pole；The anode of diode D1 is connected with the negative electrode of diode D3 and is connected with resistance R8 one end；The anode of diode D2 and two poles
The negative electrode of pipe D4 is connected and is connected with one end of resistance R9；The pins of voltage-stabiliser tube D5 first connect the resistance R8 other ends, voltage-stabiliser tube D5
Second pin is connected with one end of resistance R10, the negative electrode of the anode and diode D4 of the pins of voltage-stabiliser tube D5 the 3rd and diode D2
It is connected；Electric capacity C4 and resistance R9 are connected in parallel between the pin of voltage-stabiliser tube the 3rd and the other end of resistance R10.
Preferably, the triode Q1 and triode Q2 is NPN type triode.
Preferably, the chip U1 is photoelectrical coupler.
Preferably, the triode Q3 is positive-negative-positive triode.
Preferably, the voltage-stabiliser tube D5 models TL431.
A kind of signal electrical source protecting equipment, including：Shell and circuit board, the circuit board set just like claim 1-8 it
Signal protection circuit described in one, the shell is provided with input interface and output interface, and input interface is used to connect signal
Source output terminal, output interface is devices under input for connection.
Compared to existing technology, the beneficial effects of the utility model are：Being adjusted by setting signal matching network unit can
Becoming electric capacity can carry out resonant selecting frequency matching to the multi-signal of different frequency sections；Carried out by setting unidirectional phototube coupling unit
Isolation signals are transmitted and isolate interference signal and signal source is coupled；Signal source signal is entered by setting control driver element
Row amplifies controlled output.
Brief description of the drawings
Fig. 1 is the schematic diagram of board circuit in embodiment of the present utility model；
In figure：10th, Signal Matching NE；20 unidirectional phototube coupling units；30 control driver elements.
Specific embodiment
Below, with reference to accompanying drawing and specific embodiment, the utility model is described further：
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and implementation
Example, is further elaborated to the utility model.It should be appreciated that specific embodiment described herein is only used to explain
The utility model, is not used to limit the utility model.
Preferably to describe the utility model embodiment, " front, back, left, right, up, down " described in this specification with it is attached
Direction in figure is consistent.
The utility model provides a kind of power protection being connected between control signal source and reception signalling arrangement passage
Circuit and device.Due to receiving signalling arrangement in electromagnetic compatibility anti-interference test is done, the high currents that use most of at present are noted
Enter method, in Bulk current injection method, interference signal can be coupled in signal source, cause the anti-interference that cannot judge to be devices under
The problem of ability or signal source.Device in the utility model plays the effect of isolation interference signal coupled signal source, makes two
Person is independent mutually, while ensureing that control signal source distortionless can be transferred in reception signalling arrangement.Hereinafter described tested
Equipment is also to receive signalling arrangement.
A kind of signal electrical source protecting equipment for electromagnetic compatibility anti-interference test, including shell and circuit board.As shown in figure 1,
Shell (not shown) is provided with input interface J1 and output interface J2, and when using, input interface J1 connecting signal source output ends are defeated
Outgoing interface J2 connections are devices under input；Circuit board is provided with Signal Matching NE 10, unidirectional phototube coupling unit 20
And control driver element 30.Signal Matching NE, carries out resonance and matches and put for the input signal to different frequency
Greatly；Unidirectional phototube coupling unit, signal for the amplification of linear transfer Signal Matching NE output and to interference signal
Carrying out isolation prevents from being coupled to signal source；And control driver element, the signal for amplifying unidirectional phototube coupling unit output.
Signal Matching NE, unidirectional phototube coupling unit and control driver element are sequentially connected electrically；Signal source input signal is suitable
Sequence carries out resonance amplification by Signal Matching NE, and unidirectional Phototube Coupling unit wires sexual isolation transmission controls driver element
Control enhanced processing output is to being devices under.
In Fig. 1, Signal Matching NE include resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, electric capacity C1,
Electric capacity C2, electric capacity C3, variable capacitance CB1, variable capacitance CB2, inductance L1, triode Q1, triode Q2 and power vd D, its
Middle triode Q1 and triode Q2 is NPN type triode；The colelctor electrode of triode Q1 is connected by series resistor R4 and power vd D
Connect, the colelctor electrode of triode Q1 is also connected by sequential series variable capacitance CB1, inductance L1 with the base stage of triode Q2；Three poles
The first end of the base series resistor R1 connecting signal sources of pipe Q1；The emitter stage of triode Q1 is connected with the emitter stage of triode Q2
To the second end of signal source；Electric capacity C1 and resistance R2 are parallel between the base stage of triode Q1 and emitter stage, electric capacity C2 and resistance
R3 is parallel between the collector and emitter of triode Q1；Variable capacitance CB2 one end and inductance L1, the knot of variable capacitance CB1
Point connection, the other end is connected with the emitter stage of triode Q2；The colelctor electrode of triode Q2 is connected by series resistor R5 and power vd D
Connect, the colelctor electrode of triode Q2 is also connected by serial capacitance C3 with unidirectional phototube coupling unit.According to needed for being devices under
Input signal, adjust variable capacitance CB1 and variable capacitance CB2, selection suitable parameters formed resonance oscillations.Input signal is through electricity
Resistance R1 is transferred to the base stage of triode Q1, is exported through colelctor electrode after amplifying through triode Q1, by resonance oscillations, output to three poles
Pipe Q2 carries out signal and is amplified and output to unidirectional phototube coupling unit again.
In Fig. 1, unidirectional phototube coupling unit 20 includes that chip U1, chip U1 are photoelectrical coupler, and it has four pins；
One end of the output capacitor C3 of the first pin connection Signal Matching NE, the second end of second pin connecting signal source,
3rd pin, the 4th pin connection control driver element.The signal of Signal Matching network inputs is carried out Phototube Coupling by chip U1
Linear transfer drives network to control.In interference signal is input to and is devices under, holding wire can be coupled, to signal
Source is transmitted, due to being provided with photoelectrical coupler in transmission channel, using the not reversible transmission characteristic of photoelectrical coupler, interference
Signal can not advance and be transferred to signal source, solve interference signal coupled signal source, and the two mixing causes judgement to be devices under
The problem of anti-interference error.
In Fig. 1, control driver element includes resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, electric capacity C10, two
Pole pipe D1, diode D2, diode D3, diode D4, voltage-stabiliser tube D5 and triode Q3；The base stage of triode Q3 is by concatenation
Resistance R7 is connected with the 4th pin of the chip U4 in phototube coupling unit；The emitter stage of triode Q3 by series resistor R6 with
The 4th pin connection of chip U4, the emitter stage of triode Q3 is also connected with diode D1, the negative electrode of diode D2；Triode Q3's
3rd pin of colelctor electrode connection chip U1, the colelctor electrode of triode Q3 is also connected with diode D3, the anode of diode D4；Two poles
The anode of pipe D1 is connected with the negative electrode of diode D3 and is connected with resistance R8 one end；The anode of diode D2 and the moon of diode D4
Extremely it is connected and is connected with one end of resistance R9；The pins of voltage-stabiliser tube D5 first connect the resistance R8 other ends, voltage-stabiliser tube D5 second pins
One end with resistance R10 is connected, and the pins of voltage-stabiliser tube D5 the 3rd are connected with the anode of diode D2 with the negative electrode of diode D4；Electric capacity
C4 and resistance R9 are connected in parallel between the pin of voltage-stabiliser tube the 3rd and the other end of resistance R10.It is devices under two ends and voltage-stabiliser tube is provided
The pins of D5 first, second pin two ends input voltage, 2.5 voltages, diode D2 conductings, three are exported through the pins of voltage-stabiliser tube D5 the 3rd
Pole pipe Q3 emitter stages obtain operating voltage, and triode Q3 is operated in magnifying state, after input signal is amplified through triode, diode
D3 is turned on, and the input signal after amplification is input in being devices under through resistance R8.
In the utility model embodiment, beneficial effect is：Being adjusted by setting signal matching network unit can power transformation
Appearance can carry out resonant selecting frequency matching to the multi-signal of different frequency sections；Isolated by setting unidirectional phototube coupling unit
Signal transmission is simultaneously isolated interference signal signal source is coupled；Signal source signal is put by setting control driver element
Big controlled output.
It will be apparent to those skilled in the art that technical scheme that can be as described above and design, make other various
It is corresponding to change and deformation, and all these change and deformation should all belong to the protection of the utility model claim
Within the scope of.
Claims (9)
1. a kind of signal protection circuit, it is characterised in that including：
Signal Matching NE, carries out resonance and matches and amplify for the input signal to different frequency；
Unidirectional phototube coupling unit, signal for the amplification of linear transfer Signal Matching NE output and to interference signal
Isolated；
And control driver element, the signal for amplifying unidirectional phototube coupling unit output；
The Signal Matching NE, unidirectional phototube coupling unit and control driver element are sequentially connected electrically；The signal
Source input signal sequentially passes through Signal Matching NE and carries out resonance amplification, and unidirectional Phototube Coupling unit wires sexual isolation is transmitted,
Control driver element control enhanced processing output.
2. signal protection circuit according to claim 1, it is characterised in that the Signal Matching NE includes electricity
Resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, electric capacity C1, electric capacity C2, electric capacity C3, variable capacitance CB1, variable capacitance
CB2, inductance L1, triode Q1, triode Q2 and power vd D；The colelctor electrode of triode Q1 passes through series resistor R4 and power supply
VDD is connected, and the colelctor electrode of triode Q1 is also connected by sequential series variable capacitance CB1, inductance L1 with the base stage of triode Q2；
The first end of the base series resistor R1 connecting signal sources of triode Q1；The emitter stage of triode Q1 and the emitter stage of triode Q2
It is connected to the second end of signal source；Electric capacity C1 and resistance R2 are parallel between the base stage of triode Q1 and emitter stage, electric capacity C2 with
Resistance R3 is parallel between the collector and emitter of triode Q1；Variable capacitance CB2 one end and inductance L1, variable capacitance CB1
Node connectedness, the other end is connected with the emitter stage of triode Q2；The colelctor electrode of triode Q2 passes through series resistor R5 and power supply
VDD is connected, and the colelctor electrode of triode Q2 is also connected by serial capacitance C3 with unidirectional phototube coupling unit.
3. signal protection circuit according to claim 1 and 2, it is characterised in that the unidirectional phototube coupling unit bag
Chip U1 is included, it has four pins；First pin connects the output end of Signal Matching NE, second pin connection signal
Second end in source, the 3rd pin, the 4th pin connection control driver element.
4. signal protection circuit according to claim 3, it is characterised in that the control driver element includes resistance
R6, resistance R7, resistance R8, resistance R9, resistance R10, electric capacity C10, diode D1, diode D2, diode D3, diode D4,
Voltage-stabiliser tube D5 and triode Q3；The base stage of triode Q3 pass through the chip U4 in series resistor R7 and phototube coupling unit the
Four pins are connected；The emitter stage of triode Q3 is connected by series resistor R6 with the 4th pin of chip U4, the hair of triode Q3
Emitter-base bandgap grading is also connected with diode D1, the negative electrode of diode D2；3rd pin of the colelctor electrode connection chip U1 of triode Q3, triode
The colelctor electrode of Q3 is also connected with diode D3, the anode of diode D4；The anode of diode D1 is connected simultaneously with the negative electrode of diode D3
It is connected with resistance R8 one end；The anode of diode D2 is connected with the negative electrode of diode D4 and is connected with one end of resistance R9；Voltage stabilizing
The pins of pipe D5 first connect the resistance R8 other ends, and voltage-stabiliser tube D5 second pins are connected with one end of resistance R10, voltage-stabiliser tube D5 the 3rd
Pin is connected with the anode of diode D2 with the negative electrode of diode D4；Electric capacity C4 and resistance R9 be connected in parallel on the pin of voltage-stabiliser tube the 3rd with
Between the other end of resistance R10.
5. signal protection circuit according to claim 2, it is characterised in that the triode Q1 and triode Q2 are
NPN type triode.
6. signal protection circuit according to claim 3, it is characterised in that the chip U1 is photoelectrical coupler.
7. signal protection circuit according to claim 4, it is characterised in that the triode Q3 is positive-negative-positive triode.
8. signal protection circuit according to claim 4, it is characterised in that the voltage-stabiliser tube D5 models TL431.
9. a kind of signal electrical source protecting equipment, including：Shell and circuit board, the circuit board are set just like one of claim 1-8
Described signal protection circuit, the shell is provided with input interface and output interface, and input interface is used for connecting signal source
Output end, output interface is devices under input for connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621358485.2U CN206251103U (en) | 2016-12-12 | 2016-12-12 | A kind of signal protection circuit and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621358485.2U CN206251103U (en) | 2016-12-12 | 2016-12-12 | A kind of signal protection circuit and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206251103U true CN206251103U (en) | 2017-06-13 |
Family
ID=59007078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621358485.2U Active CN206251103U (en) | 2016-12-12 | 2016-12-12 | A kind of signal protection circuit and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206251103U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110933291A (en) * | 2019-06-06 | 2020-03-27 | 北京仁光科技有限公司 | Cross-network interaction system and cross-network interaction method |
-
2016
- 2016-12-12 CN CN201621358485.2U patent/CN206251103U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110933291A (en) * | 2019-06-06 | 2020-03-27 | 北京仁光科技有限公司 | Cross-network interaction system and cross-network interaction method |
| CN110933291B (en) * | 2019-06-06 | 2020-07-28 | 北京仁光科技有限公司 | Cross-network interaction system and cross-network interaction method |
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