CN206611391U - Trans-impedance amplifier with Self Adaptive Control gain Larger Dynamic scope - Google Patents
Trans-impedance amplifier with Self Adaptive Control gain Larger Dynamic scope Download PDFInfo
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- CN206611391U CN206611391U CN201720252659.5U CN201720252659U CN206611391U CN 206611391 U CN206611391 U CN 206611391U CN 201720252659 U CN201720252659 U CN 201720252659U CN 206611391 U CN206611391 U CN 206611391U
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Abstract
The utility model discloses a kind of trans-impedance amplifier with Self Adaptive Control gain Larger Dynamic scope, including the level Four amplifier being sequentially connected, output buffer, signal processing unit, three groups of derailing switches and the range detector for connecting with signal processing unit and being worked for three groups of derailing switches of control, level Four amplifier is including being sequentially connected in series across resistance prime amplifier, single ended input turns differential output circuit, fixed gain amplifier one and fixed gain amplifier two, three groups of derailing switches include derailing switch group one, derailing switch group two and derailing switch group three, range detector, for detecting the voltage amplitude across resistance prime amplifier one-level amplified signal, it will be transmitted across the voltage amplitude of resistance prime amplifier one-level amplified signal to signal processing unit, and controlling switch device group one, derailing switch group two or derailing switch group three are gated.The utility model can be according to the strong and weak selection signal number of stages of amplification of input signal, you can meet the sensitivity requirement of ultra-weak electronic signal, the problem of big input electrical signal overloads can be avoided again.
Description
Technical field
The utility model belongs to amplifier technique field, and in particular to one kind has Self Adaptive Control gain Larger Dynamic scope
Trans-impedance amplifier.
Background technology
In laser imaging system, its echo optical receiver module is to receive echo-signal and optical signalling is converted to telecommunications
Number, the sensitivity of laser acquisition imaging receiver system depends on the sensitivity of the Detection Techniques and sensitive detection parts used, its entirety
Performance and the output noise and output signal-to-noise ratio of detector are closely related.In 3D imaging laser radar receiving modules, to obtain
The strength information of echo impulse, generally using linear operation mode APD detection echo impulse photoelectric currents, before receiver module simulation
End trans-impedance amplifier is used to echo impulse photoelectric current being converted to voltage signal, and with linear transimpedance gain value, therefore radar connects
Receive the output voltage and input optical power of device linearly.Due to by target range, reflectivity, the influence such as propagation in atmosphere is returned
The rangeability of wave impulse is big, therefore small weak current can either be handled by requiring that receiver AFE(analog front end) trans-impedance amplifier has
Signal, high current signal, i.e. trans-impedance amplifier can be handled again can handle the input current signal of sufficiently large dynamic range.It is existing
It is generally fixed constant value to have transimpedance gain, if the transimpedance gain value of trans-impedance amplifier is too big, disclosure satisfy that low input optical power
That is the sensitivity requirement of low current signal, but when input optical power is excessive, trans-impedance amplifier can overload；On the other hand, such as
Fruit trans-impedance amplifier yield value is small, meets the overload requirement of big input optical power, but when input optical power is small, causes to put across resistance
The sensitivity decrease of big device, or even echo pulse signal can not be detected.Thus, it can be seen that imaging laser radar receiver
The transimpedance gain value of AFE(analog front end) trans-impedance amplifier is set has difficult design with input signal dynamic range.
Utility model content
Technical problem to be solved in the utility model is have there is provided one kind for above-mentioned deficiency of the prior art
The trans-impedance amplifier of Self Adaptive Control gain Larger Dynamic scope, it designs level Four amplifier, by range detector detection across resistance
Prime amplifier one-level amplified signal is strong and weak, and then gates correspondence derailing switch group, makes trans-impedance amplifier in big input current signal
Insatiable hunger and/or nonoverload, in low input current signal, with enough high sensitivity.
In order to solve the above technical problems, the technical solution adopted in the utility model is：Moved greatly with Self Adaptive Control gain
The trans-impedance amplifier of state scope, it is characterised in that：Including the level Four amplifier, output buffer and signal transacting list being sequentially connected
Member, and for selecting the three of gain multiplication factor groups of derailing switches and connecting with signal processing unit and for controlling described three groups
The range detector of derailing switch work, wherein, the level Four amplifier is including being sequentially connected in series across resistance prime amplifier, single ended input
Turn differential output circuit, fixed gain amplifier one and fixed gain amplifier two, for amplifying input current signal and will put
Big input current signal is converted to voltage signal；
Output buffer, the voltage signal for the level Four amplifier to be exported is kept in；
Three groups of derailing switches include derailing switch group one, derailing switch group two and derailing switch group three, derailing switch group one, for selecting
Lead to across resistance prime amplifier one-level amplified signal, and the one-level amplified signal is transmitted to output buffer；Derailing switch group two, is used
In gating through turning differential output circuit and the three-level amplified signal of fixed gain amplifier one across resistance prime amplifier, single ended input, and
The three-level amplified signal is transmitted to output buffer；Derailing switch group three, for gating the level Four amplifier level Four amplification
Signal, and the level Four amplified signal is transmitted to output buffer；
Range detector, will be across resistance prime amplifier for detecting the voltage amplitude across resistance prime amplifier one-level amplified signal
The voltage amplitude of one-level amplified signal is converted to digital data transmission to signal processing unit, and controlling switch device group one, switch
Device group two or derailing switch group three are gated；
Signal processing unit, for receiving the data signal of range detector output and the voltage letter of output buffer output
Number, and the voltage signal is handled.
The above-mentioned trans-impedance amplifier with Self Adaptive Control gain Larger Dynamic scope, it is characterised in that：It is described pre- across resistance
Amplifier includes pseudo- phase inverter one and the feedback element one being connected in parallel between the input of pseudo- phase inverter one and output end.
The above-mentioned trans-impedance amplifier with Self Adaptive Control gain Larger Dynamic scope, it is characterised in that：It is described single-ended defeated
Entering to turn differential output circuit includes differential amplifier circuit and the reference amplifiers connected with the inverting input of differential amplifier circuit,
The in-phase input end of differential amplifier circuit connects with across the output end of resistance prime amplifier, reference amplifiers include pseudo- phase inverter two with
And it is connected in parallel on the feedback element two between the input of pseudo- phase inverter two and output end.
The above-mentioned trans-impedance amplifier with Self Adaptive Control gain Larger Dynamic scope, it is characterised in that：The feedback member
Part one and feedback element two are the parallel component of resistor or capacitor and resistor.
The above-mentioned trans-impedance amplifier with Self Adaptive Control gain Larger Dynamic scope, it is characterised in that：The fixed increasing
Beneficial amplifier one and fixed gain amplifier two are fully differential amplifying circuit.
The above-mentioned trans-impedance amplifier with Self Adaptive Control gain Larger Dynamic scope, it is characterised in that：The amplitude inspection
Surveying device includes the threshold generation circuits with an input and two output ends and is exported with two inputs and three
The logic circuit at end, threshold generation circuits are connected by voltage comparator one and voltage comparator two with logic circuit, threshold value production
The input of raw circuit connects with the output end of reference amplifiers, an output end and the voltage comparator one of threshold generation circuits
Inverting input connect, another output end of threshold generation circuits connects with the inverting input of voltage comparator two, electricity
The in-phase input end of comparator one and the in-phase input end of voltage comparator two is pressed to connect with across the output end of resistance prime amplifier,
The output end of voltage comparator one connects with logic circuit input, the output end and logic circuit of voltage comparator two
Another input connect, derailing switch group one, derailing switch group two or derailing switch group three are respectively by three of logic circuit outputs
End control；The voltage threshold V of the output end output of the threshold generation circuitsref1Less than another of threshold generation circuits
The voltage threshold V of output end outputref2。
The utility model has advantages below compared with prior art：
1st, the utility model trans-impedance amplifier carries out amplification step by step to the current signal of input using level Four amplifier, leads to
Cross and carry out the amplification of signal one-level and Current Voltage conversion across resistance prime amplifier, turning differential output circuit using single ended input will be single defeated
The signal for entering single output is converted to the signal of single-input double-output, is easy to the signal of fixed gain amplifier one to receive, and is easy to promote
Use.
2nd, the utility model is detected using range detector to the one-level amplified signal amplitude, strong according to actual signal
One group of derailing switch work in degree three groups of derailing switches of selection, realizes that input signal is rationally amplified, meets output voltage signal amplitude
Linear with input current signal amplitude, reliable and stable, using effect is good.
3rd, the utility model sets two voltage thresholds of different sizes using range detector, forms three sections of voltage models
Enclose, control the different closure state of three groups of derailing switches according to three sections of voltage ranges, turn on output buffer, passing through signal transacting
Analog voltage signal is converted to digital voltage signal by unit, you can meet the sensitivity requirement of ultra-weak electronic signal, can be avoided again
The problem of big input electrical signal overloads.
In summary, the utility model is novel in design rationally, can be according to the strong and weak selection signal number of stages of amplification of input signal, i.e.,
The sensitivity requirement of ultra-weak electronic signal can be met, the problem of big input electrical signal overloads can be avoided again.
Below by drawings and examples, the technical solution of the utility model is described in further detail.
Brief description of the drawings
Fig. 1 is that the utility model trans-impedance amplifier is connected block diagram with the circuit of optical-electrical converter module.
Fig. 2 is the utility model level Four amplifier and the circuit connecting relation schematic diagram of optical-electrical converter module.
Fig. 3 is the circuit theory diagrams of the utility model range detector.
Fig. 4 is the circuit connecting relation schematic diagram of the utility model output buffer and three groups of derailing switches.
Fig. 5 is circuit theory diagrams of the utility model across resistance prime amplifier.
Fig. 6 is the circuit theory diagrams of the utility model reference amplifiers.
Description of reference numerals:
1-optical-electrical converter module；2-across resistance prime amplifier；2-1-puppet phase inverter one；
2-2-feedback element one；3-range detector；3-1-threshold generation circuits；
3-2-voltage comparator two；3-3-voltage comparator one；3-4-logic circuit；
4-single ended input turns differential output circuit；4-1-differential amplifier circuit；
4-2-reference amplifiers；4-2-1-puppet phase inverter two；4-2-2-feedback element two；
5-fixed gain amplifier one；6-fixed gain amplifier two；7-derailing switch group one；
8-derailing switch group two；9-derailing switch group three；10-output buffer；
11-signal processing unit.
Embodiment
As shown in figure 1, the trans-impedance amplifier described in the utility model with Self Adaptive Control gain Larger Dynamic scope, bag
The level Four amplifier being sequentially connected, output buffer 10 and signal processing unit 11 are included, and for selecting gain multiplication factor
Three groups of derailing switches and connect with signal processing unit 11 and for controlling the range detector 3 of three groups of derailing switches work,
Wherein,
What the level Four amplifier included being sequentially connected in series turn differential output circuit 4 across resistance prime amplifier 2, single ended input, solid
Gain amplifier 1 and fixed gain amplifier 26 are determined, for amplifying input current signal and by the input current signal of amplification
Be converted to voltage signal；
Output buffer 10, the voltage signal for the level Four amplifier to be exported is kept in；
Three groups of derailing switches include derailing switch group 1, derailing switch group 28 and derailing switch group 39, and derailing switch group 1 is used
In gating across the resistance one-level amplified signal of prime amplifier 2, and the one-level amplified signal is transmitted to output buffer 10；Derailing switch
Group 28, for gating through turning differential output circuit 4 and the three-level of fixed gain amplifier 1 across resistance prime amplifier 2, single ended input
Amplified signal, and the three-level amplified signal is transmitted to output buffer 10；Derailing switch group 39, for gating the level Four
Amplifier level Four amplified signal, and the level Four amplified signal is transmitted to output buffer 10；
Range detector 3, will be across resistance pre-amplification for detecting the voltage amplitude across the resistance one-level amplified signal of prime amplifier 2
The voltage amplitude of the one-level amplified signal of device 2 is converted to digital data transmission to signal processing unit 11, and controlling switch device group one
7th, derailing switch group 28 or derailing switch group 39 are gated；
Signal processing unit 11, is exported for receiving the data signal and output buffer 10 of the output of range detector 3
Voltage signal, and the voltage signal is handled.
As shown in figure 5, in the present embodiment, it is described to include the puppet 2-1 of phase inverter one across resistance prime amplifier 2 and be connected in parallel on puppet
The 2-2 of feedback element one between the 2-1 of phase inverter one input and output end.
In the present embodiment, the pseudo- 2-1 of phase inverter one is made up of PMOS device MP1 and nmos device MN1, the 2-2 of feedback element one
Be connected in parallel between the pseudo- 2-1 of phase inverter one input and output end is in order to by the amplification of the low current signal of input and across resistance
The output end output voltage signal of amplifier 2, the pseudo- 2-1 of phase inverter one output end Vout11For PMOS device MP1 drain electrode and
The connection end of nmos device MN1 drain electrode.
As shown in Figure 2 and Figure 6, in the present embodiment, the single ended input, which turns differential output circuit 4, includes differential amplifier circuit
4-1 and the reference amplifiers 4-2 connected with differential amplifier circuit 4-1 inverting input, differential amplifier circuit 4-1's is same mutually defeated
Enter end with across the output end of resistance prime amplifier 2 to connect, reference amplifiers 4-2 includes the puppet 4-2-1 of phase inverter two and is connected in parallel on puppet
The 4-2-2 of feedback element two between the 4-2-1 of phase inverter two input and output end.
Reference amplifiers 4-2 across resistance prime amplifier 2 with using circuit structure with device parameters identical circuit and by PMOS
Device MP2 and nmos device MN2 is constituted, in order to realize single-ended signal slip sub-signal；In actual use, benchmark amplification
Device 4-2 is pseudo- phase inverter amplifying circuit and is the common-mode voltage that fixed gain amplifier 1 provides differential amplification, pseudo- phase inverter two
4-2-1 output end Vout12The connection end of the drain electrode of drain electrode and nmos device MN2 for PMOS device MP2.
In the present embodiment, the 2-2 of feedback element one and feedback element two 4-2-2 is resistor or capacitor and electricity
Hinder the parallel component of device.
When the 2-2 of the feedback element one and 4-2-2 of feedback element two is resistor, the purpose of resistor in circuit is limitation
Multiplication factor, its actual gain of existing amplifier is larger, if not limiting gain, and amplifier is easy for entering locking state,
It is the multiplication factor that a determination is determined across resistance prime amplifier 2 and reference amplifiers 4-2 by resistor.
When the 2-2 of feedback element one and the 4-2-2 of feedback element two are the parallel component of capacitor and resistor, possesses limitation
High-frequency gain can be reduced while multiplication factor, filtering clutter ripple is anti-interference.
As shown in Fig. 2 in the present embodiment, the fixed gain amplifier 1 and fixed gain amplifier 26 are complete poor
Divide amplifying circuit.
Fixed gain amplifier 1 and fixed gain amplifier 26 are that the fixed voltage gain of two-output impulse generator is put
Big device, obtains voltage gain numerical value, voltage gain can be according to specific using the ratio between its output voltage amplitude and input voltage amplitude
Laser imaging system is designed, and the setting of fixed gain amplifier 1 and fixed gain amplifier 26 is in order that across resistance
The equivalent output voltage and the input current signal of trans-impedance amplifier that amplifier is obtained are linearly proportional.
As shown in figure 3, in the present embodiment, the range detector 3 is included with an input and two output ends
Threshold generation circuits 3-1 and the logic circuit 3-4 with two inputs and three output ends, threshold generation circuits 3-1 are logical
The 3-3 of over-voltage comparator one and the 3-2 of voltage comparator two are connected with logic circuit 3-4, threshold generation circuits 3-1 input
Connect with reference amplifiers 4-2 output end, a threshold generation circuits 3-1 output end is anti-with the 3-3's of voltage comparator one
Phase input connects, and threshold generation circuits 3-1 another output end connects with the 3-2 of voltage comparator two inverting input,
The 3-3 of voltage comparator one in-phase input end and the 3-2 of voltage comparator two in-phase input end with across resistance prime amplifier 2 it is defeated
Go out end to connect, the 3-3 of voltage comparator one output end connects with a logic circuit 3-4 input, the 3-2 of voltage comparator two
Output end connect with logic circuit 3-4 another input, derailing switch group 1, derailing switch group 28 or derailing switch group 39
Controlled respectively by logic circuit 3-4 three output ends；The voltage threshold of the output end output of the threshold generation circuits 3-1
Value Vref1The voltage threshold V of another output end output less than threshold generation circuits 3-1ref2。
As shown in figure 4, in actual use, threshold generation circuits 3-1 setting is for output voltage threshold value Vref1And electricity
Press threshold value Vref2, voltage threshold Vref1It is used as the input voltage of the 3-3 of voltage comparator one inverting input, voltage threshold Vref2
As the input voltage of the 3-2 of voltage comparator two inverting input, wherein, Vref1<Vref2, threshold generation circuits 3-1 input
Amplifier 4-2 output voltage, works as V on the basis of common-mode voltageout11>Vref2When, the 3-2 of voltage comparator two output low levels, electricity
The 3-3 of comparator one output low levels are pressed, it is high level logic circuit 3-4 is exported S1, and S2 and S3 is low level；Work as Vref1<
Vout11<Vref2When, the 3-2 of voltage comparator two output high level, the 3-3 of voltage comparator one output low levels make logic circuit 3-4
Output S2 is high level, and S1 and S3 is low level；Work as Vout11<Vref1When, the 3-2 of voltage comparator two output high level, voltage
The 3-3 of comparator one exports high level, and it is high level logic circuit 3-4 is exported S3, and S1 and S2 is low level.
Derailing switch group 1, derailing switch group 28 or derailing switch group 39 are controlled by logic circuit 3-4 three output ends respectively
And be high level triggering, work as Vout11>Vref2When, logic circuit 3-4 outputs S1 is high level, and S2 and S3 is low level, switch
Device group 1 is triggered connection, across, through the temporary output of output buffer 10, realizing input after the resistance one stage signal of prime amplifier 2 amplification
Current signal one-level is amplified；Work as Vref1<Vout11<Vref2When, logic circuit 3-4 outputs S2 is high level, and S1 and S3 is low electricity
Flat, derailing switch group 28 is triggered connections, turns differential output circuit 4 across resistance prime amplifier 2, single ended input and fixed gain is amplified
Through the temporary output of output buffer 10 after the amplification of the three-level signal of device 1, realize that input current signal three-level is amplified；Work as Vout11<
Vref1When, logic circuit 3-4 outputs S3 is high level, and S1 and S2 is low level, across resistance prime amplifier 2, single ended input slip
Divide after output circuit 4, fixed gain amplifier 1 and the amplification of the level Four signal of fixed gain amplifier 26 through output buffer 10
Temporary output, realizes that input current signal level Four is amplified.
Output buffer 10 constitutes differential input end by transistor MN11 and MN12, and resistance RP1 and RP2 is used as matching electricity
Device is hindered, nmos pass transistor MN10 provides bias current sources for differential input transistor MN11 and MN12；In actual use, switch
Device group 1 is that control type switches set TG1, control type switches set TG1 switch TG11 by control type and control type switch TG12 is constituted,
Wherein, the control type switch TG11 pseudo- 2-1 of phase inverter one of input connection output end Vout11, output end, which is connected to, exports buffering
The input transistors MN11 of device 10 grid, the control type switch TG12 pseudo- 4-2-1 of phase inverter two of input connection output end
Vout12, output end is connected to the input transistors MN12 of output buffer 10 grid, and control type switch TG11 and control type are opened
Close the output S1 signals that TG12 control ends are all connected with logic circuit 3-4；Derailing switch group 28 is control type switches set TG2, control type
Switches set TG2 switchs TG21 by control type and control type switch TG22 is constituted, wherein, control type switch TG21 input connects
Meet the first output end V of fixed gain amplifier 1out21, output end is connected to the input transistors MN11 of output buffer 10
Grid, control type switch TG22 input is connected the second output end V of gain amplifier 1out22, output end connection
To the input transistors MN12 of output buffer 10 grid, control type switch TG21 and control type switch TG22 control ends connect
Connect logic circuit 3-4 output S2 signals；Derailing switch group 39 is control type switches set TG3, and TG3 is by controlling for control type switches set
Type switchs TG31 and control type switch TG32 is constituted, wherein, control type switch TG31 input is connected gain amplifier
26 the first output end Vout31, output end is connected to the input transistors MN11 of output buffer 10 grid, control type switch
TG32 input is connected the second output end V of gain amplifier 26out32, output end is connected to output buffer 10
Input transistors MN12 grid, control type switch TG31 and control type switch TG32 control ends are all connected with logic circuit 3-4's
Export S3 signals.
As shown in figure 1, actual use when, using optical-electrical converter module 1 convert optical signals to current signal input to
The trans-impedance amplifier realizes optic communication, the optical signal of reception is converted to current signal as the input of the trans-impedance amplifier
Signal, and optical-electrical converter module 1 is using photodiode APD.
The utility model using optical-electrical converter module 1 in use, convert optical signals to electric signal, and the electric signal is micro-
Weak current signal, amplifies the faint current signal one-level and voltage conversion using across resistance prime amplifier 2, while input is extremely
Range detector 3 carries out signal strength detection, and range detector 3 exports two voltage thresholds, forms three sections of voltage ranges, this three
Section voltage range includes high-stage voltage range, middle stage voltage range and low order section voltage range, electricity after one-level is amplified
When pressure value is in high-stage voltage range, the drive control type switches set TG1 of range detector 3 conductings, the electricity after one-level amplification
Pressure value is directly transferred to output buffer 10, it is to avoid trans-impedance amplifier saturation or overload；Magnitude of voltage after one-level is amplified is in
When in middle stage voltage range, the drive control type switches set TG2 of range detector 3 conductings, the magnitude of voltage after one-level amplification is through list
End input turns differential output circuit 4 and the amplification of the two-stage of fixed gain amplifier 1, forms three-level amplified signal and transmits to output
Buffer 10, makes input signal effectively amplify；When the magnitude of voltage after one-level amplification is in low order section voltage range, amplitude
The drive control type switches set TG3 of detector 3 is turned on, and the magnitude of voltage after one-level amplification turns differential output circuit 4 through single ended input, consolidated
Determine gain amplifier 1 and the amplification of the three-level of fixed gain amplifier 26, form level Four amplified signal and transmit to output buffer
10, meet the sensitivity requirement of ultra-weak electronic signal；Output buffer 10 is by the electric signal transmission after amplification to signal processing unit
The final equivalent output voltage of 11 outputs, using effect is good.
It is described above, only it is preferred embodiment of the present utility model, not the utility model is imposed any restrictions, every
Any simple modification, change and the equivalent structure change made according to the utility model technical spirit to above example, still
Belong in the protection domain of technical solutions of the utility model.
Claims (6)
1. the trans-impedance amplifier with Self Adaptive Control gain Larger Dynamic scope, it is characterised in that：Including the level Four being sequentially connected
Amplifier, output buffer (10) and signal processing unit (11), and for selecting three groups of derailing switches of gain multiplication factor
Range detector (3) with connecting with signal processing unit (11) and for controlling three groups of derailing switches work, wherein,
What the level Four amplifier included being sequentially connected in series turn differential output circuit (4) across resistance prime amplifier (2), single ended input, solid
Gain amplifier one (5) and fixed gain amplifier two (6) are determined, for amplifying input current signal and by the input current of amplification
Signal is converted to voltage signal；
Output buffer (10), the voltage signal for the level Four amplifier to be exported is kept in；
Three groups of derailing switches include derailing switch group one (7), derailing switch group two (8) and derailing switch group three (9), derailing switch group one
(7), for gating across resistance prime amplifier (2) one-level amplified signal, and the one-level amplified signal is transmitted to output buffer
(10)；Derailing switch group two (8), for gating through turning differential output circuit (4) and fixed across resistance prime amplifier (2), single ended input
Gain amplifier one (5) three-level amplified signal, and the three-level amplified signal is transmitted to output buffer (10)；Derailing switch group
Three (9), are transmitted to output buffer for gating the level Four amplifier level Four amplified signal, and by the level Four amplified signal
(10)；
Range detector (3), will be across resistance pre-amplification for detecting the voltage amplitude across resistance prime amplifier (2) one-level amplified signal
The voltage amplitude of device (2) one-level amplified signal is converted to digital data transmission to signal processing unit (11), and controlling switch device
One (7) of group, derailing switch group two (8) or derailing switch group three (9) gating；
Signal processing unit (11), data signal and output buffer (10) output for receiving range detector (3) output
Voltage signal, and the voltage signal is handled.
2. according to the trans-impedance amplifier with Self Adaptive Control gain Larger Dynamic scope described in claim 1, it is characterised in that：
It is described to include pseudo- phase inverter one (2-1) across resistance prime amplifier (2) and be connected in parallel on input and the output of pseudo- phase inverter one (2-1)
Feedback element one (2-2) between end.
3. according to the trans-impedance amplifier with Self Adaptive Control gain Larger Dynamic scope described in claim 2, it is characterised in that：
The single ended input, which turns differential output circuit (4), includes differential amplifier circuit (4-1) and anti-phase with differential amplifier circuit (4-1)
Reference amplifiers (4-2) that input connects, the in-phase input end of differential amplifier circuit (4-1) with across resistance prime amplifier (2)
Output end connects, and reference amplifiers (4-2) include pseudo- phase inverter two (4-2-1) and are connected in parallel on pseudo- phase inverter two (4-2-1)
Feedback element two (4-2-2) between input and output end.
4. according to the trans-impedance amplifier with Self Adaptive Control gain Larger Dynamic scope described in claim 3, it is characterised in that：
The feedback element one (2-2) and feedback element two (4-2-2) are the parallel component of resistor or capacitor and resistor.
5. according to the trans-impedance amplifier with Self Adaptive Control gain Larger Dynamic scope described in claim 1, it is characterised in that：
The fixed gain amplifier one (5) and fixed gain amplifier two (6) are fully differential amplifying circuit.
6. according to the trans-impedance amplifier with Self Adaptive Control gain Larger Dynamic scope described in claim 3, it is characterised in that：
The range detector (3) is including the threshold generation circuits (3-1) with an input and two output ends and with two
Individual input and the logic circuit of three output ends (3-4), threshold generation circuits (3-1) by voltage comparator one (3-3) and
Voltage comparator two (3-2) is connected with logic circuit (3-4), input and the reference amplifiers (4- of threshold generation circuits (3-1)
2) output end connects, the output end and the inverting input phase of voltage comparator one (3-3) of threshold generation circuits (3-1)
Connect, another output end of threshold generation circuits (3-1) connects with the inverting input of voltage comparator two (3-2), voltage ratio
Compared with device one (3-3) in-phase input end and voltage comparator two (3-2) in-phase input end with across resistance prime amplifier (2) it is defeated
Go out end to connect, the output end of voltage comparator one (3-3) connects with an input of logic circuit (3-4), voltage comparator
Two (3-2) output end connects with another input of logic circuit (3-4), derailing switch group one (7), derailing switch group two (8)
Or derailing switch group three (9) is controlled by three output ends of logic circuit (3-4) respectively；The one of the threshold generation circuits (3-1)
The voltage threshold V of individual output end outputref1The voltage threshold exported less than another output end of threshold generation circuits (3-1)
Vref2。
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106817101A (en) * | 2017-03-15 | 2017-06-09 | 中国人民解放军火箭军工程大学 | Trans-impedance amplifier and receiver with Self Adaptive Control gain Larger Dynamic scope |
| CN108344888A (en) * | 2018-01-26 | 2018-07-31 | 中国人民解放军战略支援部队信息工程大学 | Small signal circuit detection device and its method in communication line based on circuit transmission |
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2017
- 2017-03-15 CN CN201720252659.5U patent/CN206611391U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106817101A (en) * | 2017-03-15 | 2017-06-09 | 中国人民解放军火箭军工程大学 | Trans-impedance amplifier and receiver with Self Adaptive Control gain Larger Dynamic scope |
| CN108344888A (en) * | 2018-01-26 | 2018-07-31 | 中国人民解放军战略支援部队信息工程大学 | Small signal circuit detection device and its method in communication line based on circuit transmission |
| CN108344888B (en) * | 2018-01-26 | 2020-07-10 | 中国人民解放军战略支援部队信息工程大学 | Circuit transmission-based small signal circuit detection device and method in communication line |
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