CN206595965U - A kind of sense amp circuit with electromagnetic interference rejection ability - Google Patents
A kind of sense amp circuit with electromagnetic interference rejection ability Download PDFInfo
- Publication number
- CN206595965U CN206595965U CN201720198251.4U CN201720198251U CN206595965U CN 206595965 U CN206595965 U CN 206595965U CN 201720198251 U CN201720198251 U CN 201720198251U CN 206595965 U CN206595965 U CN 206595965U
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- amplifier
- integrated circuit
- detection module
- light detection
- circuit
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Abstract
The utility model discloses a kind of sense amp circuit with electromagnetic interference rejection ability, including light detection module and amplifier integrated circuit, the smooth detection module includes photodiode, the output pin of light detection module and the first loop antenna, wherein the quantity of the output pin of light detection module is two, and output pin of the photodiode respectively with two light detection modules is connected, the amplifier integrated circuit includes the input pin of amplifier integrated circuit, electric capacity, transistor, second loop antenna and amplifier output pin, wherein the quantity of the input pin of amplifier integrated circuit is two, and the input pin of amplifier integrated circuit is corresponding with the output pin of light detection module, two bonding lines are connected between the output pin of light detection module and the input pin of amplifier integrated circuit, and two bonding lines intersect setting.The utility model is reasonable in design, effectively suppression electromagnetic interference, and will not increase hardware cost and volume.
Description
Technical field
The utility model is related to electromagnetic signal perturbation technique field, more particularly to a kind of with electromagnetic interference rejection ability
Sense amp circuit.
Background technology
Optical receiver module receives the light data transmission signal of (GHz) at a high speed by the optical fiber known to industry.At these
Generally there is a photo-detector by the electric signal transmission being coupled out to amplifying circuit in optical receiver module, process is：Optical fiber will
Optical signal is found on photo-detector, and then photo-detector response produces photoelectric current, and amplifying circuit amplifies these current signals.
In the application for receiving sensor, the electromagnetic interference problem of transducing signal is generally faced.This electromagnetic interference is asked
Topic is due to the signal produced by sensor, the signal of sensor amplification, and the signal on circuit, these signal amplitudes difference
It is too big caused.For example, generally in microampere to the photoelectric current between milliampere produced by photodiode.However, across resistance amplification
The signal of photodiode is converted into amplitude in 0.25-5V even more big voltage signals by device or other change-over circuits.This
Individual voltage signal terminates 50-Ohm resistance, and 5-100mA circulation is produced in the place of closely photodiode.This circulation
Produce a very big interference signal.Therefore, this interference signal must be reduced.It is as shown in Figure 1 current existing skill
In art, the layout of photodiode and corresponding amplifying circuit, this layout electromagnetic interference described before just having.
Fig. 1 is the schematic diagram that a photodiode is connected to an amplifier integrated circuit.Photo-detector shown in Fig. 1
It is made up of photodiode and two photo-detector output pins.Photodiode is connected to photo-detector output pin, because
This electric current for working as produced by photodiode receives light stimulus has been flowed on these output pins.
Input of the amplifier integrated circuit by connecting photo-detector module output pin and amplifier integrated circuit is drawn
The bonding line response light detector module of pin.In the example depicted in figure 1, the amplifier integrated circuit that signal is input to is by one
Transistor and an electric capacity are represented.Amplifier integrated circuit is exported result to late-class circuit by amplifier output pin.Put
The amplifier that big device integrated circuit is included may be considered one kind in art.A kind of application therein, can be with
The photo-signal that photodetector is provided is converted into the convenient electric signal handled by late-class circuit using trans-impedance amplifier.
It is illustrated in figure 2 in currently existing technology, a kind of photodiode comprising Fig. 1 circuit theory diagrams-amplifier electricity
The layout block diagram on road.In fig. 2, photo-detector module includes a photodiode, the connected light inspection of photodiode connection
Survey the bonding line of module output pin and amplifier integrated circuit input pin.
Fig. 3 is shown in currently existing technology, and a kind of photodiode-amplifier connects the emulation three-dimensional view angle of circuit.
In figure 3, photo-detector module includes a photodiode, the connected light detection module output pin of photodiode connection
And the bonding line of amplifier integrated circuit input pin.Amplifier integrated circuit can be a kind of knot in art
Structure, structure for example before described by Fig. 1.
Although in photodiode in the prior art, as Figure 1-3-amplifier connection circuit, can effectively by
The photoelectricity that photodiode is produced is streamed in amplifier integrated circuit.But so processing is not optimal, because these
Circuit is to amplifier output signal, and the optical detector module that is included of system and its produced by amplifier integrated circuit
His interference of signal is very sensitive.Sensitivity to interference signal can be found out by Fig. 1 before.When light detects mould
When block is connected to amplifier integrated circuit by two parallel bonding lines, high Q RF loops will be formed, connect Ru same
Receive antenna.Shown in the dotted line of this loop in Fig. 1.This loop antenna is output to input coupling to amplifier integrated circuit
Close, and cause the unstable interference of the distorted signals and device of whole system, it is very sensitive.In other words, by amplifier
Signal passes through the change of electromagnetic field caused by loop antenna device in output or system, will produce the ring of an interference photoelectric current
Road electric current, this interference electric current is produced by pipe detection module, and will cause systematic distortion and unstable.
There is research to be directed to reducing the interference sensitlzing effect of high Q RF loops as shown in Figure 1 before.One kind side therein
Formula is as shown in Figure 4.Fig. 4 is the three end light detection module circuit theory diagrams for being connected to amplifier integrated circuit.Fig. 4 light inspection
Module is surveyed to be made up of 3 short photodiodes and 3 light detection module output pins.
Amplifier integrated circuit is by connecting the input pin of light detection module output pin and amplifier integrated circuit
Bonding line, response light detection module.In the example in fig. 4, amplifier integrated circuit is by a transistor and an electric capacity, by
In the connection in photodiode-amplifier circuit, by introduce two pairs of loops in opposite direction come reduce be output to input,
And the influence that other in system are disturbed, therefore Fig. 4 structure is better than Fig. 1.The two loops are by 3 end photodiodes, key
Zygonema, and amplifier integrated circuit composition.Loop composition in similar two Fig. 1 of the two loops.However, due to the two
Loop disturbing effect is cancelled out each other, and experimentally the interference suppressioning effect of the two loops is better than the circuit shown in Fig. 1.More
Specifically, because one of loop is close, and almost similar in appearance to produced by another loop, therefore a loop
Electromagnetic field change will be offset by another loop.This structure naturally has the special feature that one of loop is produced
Change produced by the change of raw electromagnetic field, with another loop is close consistent in amplitude, but in the opposite direction.
Due to cancelling out each other for two interference electric currents, therefore to be transferred to amplifier integrated for the signal code only produced by photodiode
In circuit.
Although on to inside and outside interference, Fig. 4 structure is better than Fig. 1, and it lacks advantage in cost.
Fig. 4 circuit needs 3 higher end photodiodes of cost, and needs extra input and output pin, and extra
Bonding line.In addition, Fig. 4 structure needs additional space cost compared to Fig. 1.All controlled in a system cost and space
Obtain under very strict environment, Fig. 4 scheme is unacceptable.
Therefore, one kind is needed to improve electromagnetic interference problem at present, while avoid increasing cost and pin number again
Solution.
Utility model content
The purpose of this utility model is that, in order to solve shortcoming present in prior art, and the one kind proposed is dry with electromagnetism
Disturb the sense amp circuit of rejection ability.
To achieve these goals, the utility model employs following technical scheme：
A kind of sense amp circuit with electromagnetic interference rejection ability, including light detection module and the integrated electricity of amplifier
Road, the smooth detection module includes photodiode, the output pin of light detection module and the first loop antenna, and wherein light is detected
The quantity of the output pin of module is two, and output pin of the photodiode respectively with two light detection modules is connected, institute
Stating amplifier integrated circuit includes input pin, electric capacity, transistor, the second loop antenna and the amplifier of amplifier integrated circuit
The quantity of the input pin of output pin, wherein amplifier integrated circuit is two, and the input pin of amplifier integrated circuit
Output pin with light detection module is corresponding, the output pin of light detection module and the input pin of amplifier integrated circuit it
Between be connected with two bonding lines, and two bonding lines intersect setting, the input pin of one of amplifier integrated circuit
It is connected with one end of electric capacity, the other end of electric capacity and the emitter stage of transistor are connected, the base stage of transistor and another amplifier
The input pin connection of integrated circuit, amplifier output pin is connected with late-class circuit.
It is preferred that, the smooth detection module is photo-detector.
It is preferred that, the opposite in phase of first loop antenna and the second loop antenna.
It is preferred that, insulating barrier is provided between the bonding line, and insulating barrier is silica, polytetrafluoroethylene (PTFE), glass, cunning
Stone, plastics or glass fibre are made.
In the utility model, a kind of sense amp circuit with electromagnetic interference rejection ability is using intersection bonding line
Structure, change electromagnetic field using loop antenna and loop antenna, and then cause the change of photoamplifier electric current, coordinate and intersect
Loop caused by the bonding line of formula is in opposite direction so that the two interference electric currents are cancelled out each other, effectively suppression electromagnetic interference, and
Hardware cost and volume will not be increased, reduce feedback and be output to the influence of input, significantly, the utility model designs cloth to effect
Office is reasonable, easy to use, effectively suppression electromagnetic interference, and will not increase hardware cost and volume.
Brief description of the drawings
Fig. 1 is the connection circuit theory diagrams of light detection module and amplifier integrated circuit in the prior art；
The layout that Fig. 2 connects for photodiode in the prior art-amplifier circuit；
The emulation 3-D view that Fig. 3 connects for photodiode in the prior art-amplifier circuit；
Fig. 4 connects the circuit theory diagrams of amplifier integrated circuit for three end Photoelectric Detection modules in the prior art；
Fig. 5 be the utility model proposes a kind of sense amp circuit with electromagnetic interference rejection ability in embodiment one
Using intersect bonding line Photoelectric Detection module and amplifier integrated circuit catenation principle figure；
Fig. 6 be the utility model proposes a kind of sense amp circuit with electromagnetic interference rejection ability in embodiment one
The corresponding layout block diagram of use cross key wire structure circuit；
Fig. 7 be the utility model proposes a kind of sense amp circuit with electromagnetic interference rejection ability in embodiment one
Be used for suppress interference cross key wire structure circuit corresponding to three-dimensional software mimetic view；
Fig. 8 be the utility model proposes a kind of sense amp circuit with electromagnetic interference rejection ability in embodiment two
By intersect bonding line connect three end light detection modules and amplifier integrated circuit circuit theory diagrams；
Fig. 9 be the utility model proposes a kind of sense amp circuit with electromagnetic interference rejection ability generation sense
The method of amplified signal AF panel；
Figure 10 be the utility model proposes a kind of sense amp circuit with electromagnetic interference rejection ability manufacture have
There is the method flow diagram of the sense amp circuit of electromagnetic interference rejection ability.
In figure：510 smooth detection modules, 520 photodiodes, the output pin of 530 smooth detection modules, 540 bonding lines,
550 amplifier integrated circuits, the input pin of 560 amplifier integrated circuits, 565 electric capacity, 570 transistors, the output of 580 amplifiers
Pin, 590 first loop antennas, 595 second loop antennas.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.
Embodiment one
Reference picture 5,6,7,9,10, a kind of sense amp circuit with electromagnetic interference rejection ability, including light detection mould
Block 510 and amplifier integrated circuit 550, light detection module 510 include photodiode 520, the output pin of light detection module
530 and first loop antenna 590, wherein the quantity of the output pin 530 of light detection module is two, and photodiode 520
It is connected respectively with the output pin 530 of two light detection modules, amplifier integrated circuit 550 includes the defeated of amplifier integrated circuit
Enter pin 560, electric capacity 565, transistor 570, the second loop antenna 595 and amplifier output pin 580, wherein amplifier is integrated
The quantity of the input pin 560 of circuit is two, and the output of the input pin 560 and light detection module of amplifier integrated circuit
Pin 530 is corresponding, is connected between the output pin 530 of light detection module and the input pin 560 of amplifier integrated circuit
Two bonding lines 540, and two bonding lines 540 intersect setting, the input pin 560 of one of amplifier integrated circuit
Be connected with one end of electric capacity 565, the other end of electric capacity 565 is connected with the emitter stage of transistor 570, the base stage of transistor 570 with
The input pin 560 of another amplifier integrated circuit is connected, and amplifier output pin 580 is connected with late-class circuit.
In the utility model, light detection module 510 is photo-detector, the first loop antenna 590 and the second loop antenna 595
Opposite in phase, insulating barrier is provided between bonding line 540, and insulating barrier is silica, polytetrafluoroethylene (PTFE), glass, talcum, modeling
Material or glass fibre are made；Amplifier integrated circuit 550 is connected to when light detection module 510 intersects bonding line 540 by two
When middle, set up similar to the two high Q RF loops of reception antenna.The two loop antennas 590 and 595 will change electromagnetic field, because
This will cause the change of photoamplifier electric current.Due to position very close to, photodiode caused by the two loop antennas-
The change of amplifier circuit electric current, close to equal in amplitude.Also, loop is in opposite direction caused by intersecting bonding line,
Naturally the change of photodiode-amplifier circuit electric current caused by the two upper loop antennas is in opposite direction.The two are done
Disturb electric current to cancel out each other, therefore improve electromagnetic interference, in photodiode-amplifying circuit only have photodiode produced by
Electric current be amplified；The utility model is changed using the structure for intersecting bonding line using loop antenna 590 and loop antenna 595
Electromagnetic Field, and then cause the change of photoamplifier electric current, coordinate loop caused by the bonding line of staggered form in the opposite direction, to make
Obtain the two interference electric currents to cancel out each other, effectively suppression electromagnetic interference, and hardware cost and volume will not be increased, reduce feedback
And the influence of input is output to, significantly, the utility model layout is rationally, easy to use, effectively suppresses electromagnetism for effect
Interference, and hardware cost and volume will not be increased.
Embodiment two
There is a kind of reference picture 8, sense amp circuit with electromagnetic interference rejection ability, one kind electromagnetic interference to suppress energy
The sense amp circuit of power, including light detection module 510 and amplifier integrated circuit 550, light detection module 510 include three end light
The loop antenna 590 of output pin 530 and first of electric diode 520, the light detection module at three ends, wherein three end photodiodes
520 are connected with the output pin 530 of the light detection module at three ends, and amplifier integrated circuit 550 includes amplifier integrated circuit
Input pin 560, electric capacity 565, transistor 570, the second loop antenna 595 and amplifier output pin 580, wherein amplifier collection
Quantity into the input pin 560 of circuit is three, and input pin 560 and the light detection module of amplifier integrated circuit is defeated
Go out that pin 530 is corresponding, the output pin 530 of two of which light detection module and two amplifiers being wherein correspondingly arranged are integrated
It is connected with two bonding lines 540 between the input pin 560 of circuit, and two bonding lines 540 intersect setting, one of them
The input pin 560 of amplifier integrated circuit is connected with one end of electric capacity 565, the other end of electric capacity 565 and the hair of transistor 570
Emitter-base bandgap grading is connected, and the base stage of transistor 570 is connected with the input pin 560 of another amplifier integrated circuit, and amplifier output is drawn
Pin 580 is connected with late-class circuit.
In the utility model, light detection module 510 is photo-detector, the first loop antenna 590 and the second loop antenna 595
Opposite in phase, insulating barrier is provided between bonding line 540, and insulating barrier is silica, polytetrafluoroethylene (PTFE), glass, talcum, modeling
Material or glass fibre are made；Intersecting bonding line can equally be used in the structure of three end photodiode 520, to produce similar figure
4 two positions are close, equivalent loop 590 and 595 in opposite direction.Therefore it may also used to reduce electromagnetic interference.Such as Fig. 8
It is shown, only produce the opposite loop of both direction due to intersecting bonding line, it is not necessary to Article 3 bonding line, therefore also without making
With the 3rd input pin 560 of amplifier circuit.So in circuit design, the 3rd input pin of amplifier circuit
560 can remove, so as to reduce number of pins and hardware cost.
It is described above, only the utility model preferably embodiment, but protection domain of the present utility model is not
This is confined to, any one skilled in the art is in the technical scope that the utility model is disclosed, according to this practicality
New technical scheme and its utility model design are subject to equivalent substitution or change, should all cover in protection model of the present utility model
Within enclosing.
Claims (4)
1. a kind of sense amp circuit with electromagnetic interference rejection ability, including light detection module (510) and amplifier it is integrated
Circuit (550), it is characterised in that the smooth detection module (510) includes photodiode (520), the output of light detection module
The quantity of the output pin (530) of pin (530) and the first loop antenna (590), wherein light detection module is two, and photoelectricity
Diode (520) is connected with the output pin (530) of two light detection modules respectively, amplifier integrated circuit (550) bag
Include input pin (560), electric capacity (565), transistor (570), the second loop antenna (595) and the amplification of amplifier integrated circuit
The quantity of the input pin (560) of device output pin (580), wherein amplifier integrated circuit is two, and the integrated electricity of amplifier
The input pin (560) on road is corresponding with the output pin (530) of light detection module, the output pin (530) of light detection module
Two bonding lines (540), and two bonding line (540) phases are connected between the input pin (560) of amplifier integrated circuit
Mutually arranged in a crossed manner, the input pin (560) of one of amplifier integrated circuit is connected with one end of electric capacity (565), electric capacity
(565) the other end is connected with the emitter stage of transistor (570), base stage and the integrated electricity of another amplifier of transistor (570)
Input pin (560) connection on road, amplifier output pin (580) is connected with late-class circuit.
2. a kind of sense amp circuit with electromagnetic interference rejection ability according to claim 1, it is characterised in that institute
Light detection module (510) is stated for photo-detector.
3. a kind of sense amp circuit with electromagnetic interference rejection ability according to claim 1, it is characterised in that institute
State the opposite in phase of the first loop antenna (590) and the second loop antenna (595).
4. a kind of sense amp circuit with electromagnetic interference rejection ability according to claim 1, it is characterised in that institute
State and insulating barrier is provided between bonding line (540), and insulating barrier is silica, polytetrafluoroethylene (PTFE), glass, talcum, plastics or glass
Glass fiber is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720198251.4U CN206595965U (en) | 2017-03-02 | 2017-03-02 | A kind of sense amp circuit with electromagnetic interference rejection ability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720198251.4U CN206595965U (en) | 2017-03-02 | 2017-03-02 | A kind of sense amp circuit with electromagnetic interference rejection ability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206595965U true CN206595965U (en) | 2017-10-27 |
Family
ID=60126314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720198251.4U Expired - Fee Related CN206595965U (en) | 2017-03-02 | 2017-03-02 | A kind of sense amp circuit with electromagnetic interference rejection ability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206595965U (en) |
-
2017
- 2017-03-02 CN CN201720198251.4U patent/CN206595965U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 430000 1845, room 18, block A, overseas talent building, 999 high tech Avenue, East Lake New Technology Development Zone, Wuhan, Hubei. Patentee after: Hubei free trade area east core technology Co., Ltd. Address before: 430000 8-203-029 (Y), Guan Nan Fu Xing medical park, 58 Optics Valley Road, East Lake New Technology Development Zone, Wuhan, Hubei. Patentee before: Wuhan elephant Creative Technology Limited |
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| CP03 | Change of name, title or address | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171027 Termination date: 20200302 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |