CN101001079A - Transimpedance amplifier with negative impedance compensation function - Google Patents
Transimpedance amplifier with negative impedance compensation function Download PDFInfo
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- CN101001079A CN101001079A CNA2006100049117A CN200610004911A CN101001079A CN 101001079 A CN101001079 A CN 101001079A CN A2006100049117 A CNA2006100049117 A CN A2006100049117A CN 200610004911 A CN200610004911 A CN 200610004911A CN 101001079 A CN101001079 A CN 101001079A
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Abstract
This invention relates to an impedance-transfer amplifier with a negative impedance compensation function including elements of single-stage impedance-transfer amplifier and a negative impedance compensator connected to the output end of the amplifier element, which is realized in many ways including a negative resistance element composed of positive and negative circuits and a compensation circuit against the parasitic capacitance effect generated by its output end, and the compensator increases the equivalent earth impedance of the output of the single-stage impedance-transfer amplifier and compensates the parasitic capacitance effect.
Description
Technical field
The present invention relates to the amplifier (amplifier) of light communication system (optical communication system) lining, relate in particular to a kind of commentaries on classics impedance amplifier with negative impedance compensation (negative impedance compensation) function (transimpedance amplifier, TIA).
Background technology
In light communication system, the gain (gain) of optical receiver (optical receiver) is very important characteristic with sensitivity (sensitivity), must improve both simultaneously and make transmission performance reach optimization.As shown in Figure 1, the framework 100 of traditional single-stage (single-stage) commentaries on classics impedance amplifier is simple in structure, and stability is high, mainly comprises inspection optical diode (photo diode) 101 and basic operational amplifier (operationalamplifier) 102.Yet because the output impedance magnitude of entire gain and frequency range characteristic and amplifier has substantial connection, the framework that this kind single-stage is changeed impedance amplifier can't obtain high feedback resistance value R because of its voltage gain is not enough
FAnd high sensitivity.
Generally can adopt the framework of multistage (multi-stage) commentaries on classics impedance amplifier 200 as shown in Figure 2 to realize high voltage gain.The framework of the multistage commentaries on classics impedance amplifier of this kind comprises the single amplifier 201-203 of a plurality of series connection (cascade), to obtain high feedback resistance value R
FWith high sensitivity.Yet though this multistage architecture can obtain high voltage gain, but phase margin (phase margin) control is difficult for.Particularly at the application of high dynamic range (high dynamic range), its automatic gain control (automatic gain control, AGC) be easy to cause unsettled possibility, and electrical source consumption big (large power consumption), its design is extremely difficult especially when using for high frequency range.
If the equivalent impedance ground of the output that changes impedance amplifier is uprised by low, this voltage gain that changes impedance amplifier just can significantly promote so.Therefore, overcoming above-mentioned tradition, to change the problem of impedance amplifier just challenging.
Summary of the invention
The present invention solves the shortcoming that above-mentioned tradition is changeed the impedance amplifier framework, and its main purpose provides a kind of commentaries on classics impedance amplifier with negative impedance compensate function.The present invention adds the impedance that is changed amplifier out by the negative resistance (voltage gain＞1) that regenerative circuit constituted, and add the parasitic capacitance (parasitic capacitance) that suitable negative capacitance compensates the output of this regenerative circuit, to reach the purpose of booster tension gain simultaneously and frequency range (bandwidth).
In view of the above, in the first embodiment of the present invention, it changes impedance amplifier and mainly comprises single-stage commentaries on classics impedance amplifier element, and it has output to produce equivalent impedance ground; And negative impedance compensator (negativeimpedance compensator).This negative impedance compensator is connected in the output that this single-stage is changeed the impedance amplifier element, and the equivalent impedance ground that this single-stage is changeed the impedance amplifier output is uprised by low, and compensates the parasitic capacitance effect that this output produces.
The negative impedance compensator can be realized by multiple circuit framework, mainly comprises the negative-resistance device that is made of regenerative circuit and the compensating circuit of the parasitic capacitance effect that produces at this output.The example of this compensating circuit such as resistance, electric capacity etc.
According to described commentaries on classics impedance amplifier with negative impedance compensate function, wherein this compensating circuit is a negative capacitance.
According to described commentaries on classics impedance amplifier with negative impedance compensate function, wherein this negative impedance compensator is to realize with the configuration that contains negative resistance in parallel and negative capacitance.
According to described commentaries on classics impedance amplifier with negative impedance compensate function, wherein this single-stage commentaries on classics impedance amplifier element comprises inspection optical diode and basic operational amplifier.
According to described commentaries on classics impedance amplifier with negative impedance compensate function, wherein this negative resistance is that configuration with transistor and electric capacity realizes.
According to described commentaries on classics impedance amplifier with negative impedance compensate function, wherein this negative capacitance is that configuration with transistor, diode and electric capacity realizes.
In the second embodiment of the present invention, it changes impedance amplifier and mainly comprises differential commentaries on classics impedance amplifier (differential TIA) element and negative impedance compensator.This differential commentaries on classics impedance amplifier element is to change the differential architecture that the impedance amplifier element is constituted by two single-stages, and has two outputs.And the negative impedance compensator is connected with these two outputs of this differential commentaries on classics resistance amplifier element, and compensates this two parasitic capacitance effect that output produced, and this negative impedance compensator can use as the multiple circuit framework among first embodiment and realize.
According to described commentaries on classics impedance amplifier with negative impedance compensate function, wherein, this negative impedance compensator is the differential circuit framework that is formed in parallel by two symmetrical negative impedance compensating element,s.
According to described commentaries on classics impedance amplifier with negative impedance compensate function, wherein, this differential commentaries on classics resistance amplifier element comprises inspection optical diode and two single-stages commentaries on classics resistance amplifier elements.
According to described commentaries on classics impedance amplifier with negative impedance compensate function, wherein, each this negative impedance compensating element, is to realize with the configuration that contains negative resistance in parallel and negative capacitance.
According to described commentaries on classics impedance amplifier with negative impedance compensate function, wherein, this negative resistance is that the configuration with transistor and electric capacity realizes.
According to described commentaries on classics impedance amplifier with negative impedance compensate function, wherein, this negative capacitance is that the configuration with transistor, diode and electric capacity realizes.
In simulated experiment, the frequency range with commentaries on classics impedance amplifier of negative impedance compensate function of the present invention promotes index (bandwidth enhancement factor) and can reach 3, and the application of dynamic range can be up to 30dBm.
The detailed description of following conjunction with figs., embodiment and claims, will on address other purpose of the present invention and advantage and be specified in after.
Description of drawings
Fig. 1 is the configuration diagram that a kind of known single-stage is changeed impedance amplifier.
Fig. 2 is a kind of configuration diagram of known multistage commentaries on classics impedance amplifier.
Fig. 3 is a block schematic diagram, and the framework of the first embodiment of the present invention is described.
Fig. 4 is the schematic diagram of one of first embodiment work example, and wherein the negative impedance compensator is the configuration of the negative resistance that constitutes of regenerative circuit.
Fig. 5 is the schematic diagram of the work example of first embodiment, and wherein the negative impedance compensator is the configuration that contains negative resistance and negative capacitance.
Fig. 6 is the schematic diagram of the work example of first embodiment, and wherein the negative impedance compensator is that another kind contains the different negative resistances and the configuration of negative capacitance.
Fig. 7 is a block schematic diagram, and the framework of the second embodiment of the present invention is described.
Fig. 8 decomposes the differential circuit framework of key diagram 7.
Fig. 9 is the analog result of commentaries on classics impedance amplifier of the present invention.
Figure 10 A and Figure 10 B are according to the present invention, the example of negative-resistance-compensated effect, and in Figure 10 A, transverse axis is represented frequency, longitudinal axis representative gain; In Figure 10 B, transverse axis is represented the time, and the longitudinal axis is represented volt.
Figure 11 A and Figure 11 B are according to the present invention, the example of negative capacitance compensation effect, and in Figure 11 A, transverse axis is represented frequency, longitudinal axis representative gain; In Figure 11 B, transverse axis is represented the time, and the longitudinal axis is represented volt.
Wherein, description of reference numerals is as follows:
100 single-stages are changeed resistance and are amplified 101 inspection optical diodes
102 single amplifier R
FFeedback resistance value
The single amplifier of 200 multistage commentaries on classics impedance amplifier 201-203
300 commentaries on classics impedance amplifier 301 single-stages of the present invention are changeed the impedance amplifier element
303 negative impedance compensator 301a outputs
403 negative impedance compensators
501 negative resistances, 502 negative capacitance
503 negative impedance compensators
603 negative impedance compensator T
1, T
2Transistor
C electric capacity D diode
The A grid
701 differential commentaries on classics impedance amplifier element 703 negative impedance compensators
801a, 801b single-stage are changeed the resistance amplifier element
803 inspection optical diodes
Two outputs of 805a, 805b inspection optical diode
Embodiment
Fig. 3 is a block schematic diagram, and the framework of first embodiment of the invention is described.With reference to figure 3, this changes impedance amplifier 300 and mainly comprises single-stage commentaries on classics impedance amplifier element 301 and negative impedance compensator (negativeimpedance compensator) 303.This single-stage is changeed impedance amplifier element 301 and is had output 301a, to produce equivalent impedance ground.This negative impedance compensator 303 is connected in the output 301a that this single-stage is changeed impedance amplifier element 301, and the equivalent impedance ground that this output 301a is produced is uprised by low, and compensates the parasitic capacitance effect that this output 301a is produced.
This negative impedance compensator 303 can be realized by multiple circuit framework, mainly comprises the negative-resistance device that is made of regenerative circuit and the compensating circuit of the parasitic capacitance effect that produces at this output.The example of this compensating circuit such as resistance, electric capacity etc.Below illustrate with several work examples (working example) of Fig. 4-Fig. 6.
Commentaries on classics impedance amplifier in the example of Fig. 4 changes the impedance amplifier element 301 except comprising single-stage, and its negative impedance compensator 403 is the equivalent impedance grounds that change output 301a with negative resistance that regenerative circuit is constituted.In the example of Fig. 5 the example of negative impedance compensator 503 and Fig. 4 do not exist together for, add suitable negative capacitance 502 again and compensate the parasitic capacitance that output 301a produces, to offset the restriction that this parasitic capacitance causes frequency range.In other words, in the example of Fig. 5, its negative impedance compensator 503 is to realize with the configuration that contains negative resistance 501 in parallel and negative capacitance 502.
In the example of Fig. 6, its negative impedance compensator 603 is to realize to be different from the negative resistance in Fig. 5 example and the configuration of negative capacitance.With reference to figure 6, negative resistance is with a transistor T
2Realize with the configuration of a capacitor C.Negative capacitance then is with a transistor T
1, a diode D and a capacitor C configuration realize transistor T wherein
2Be connected in parallel to grid A with transistor T 1.
Fig. 7 is a block schematic diagram, and the framework of the second embodiment of the present invention is described.With reference to figure 7, this commentaries on classics impedance amplifier with negative impedance compensate function mainly comprises differential commentaries on classics resistance amplifier element 701 and negative impedance compensator 703.This differential commentaries on classics resistance amplifier element 701 is to be changeed the resistance amplifier element and connect differential circuit framework (differential topology) form that forms by two single-stages, and has two output 701a and 701b, is connected to negative impedance compensator 703.And negative impedance compensator 703 can use as the multiple circuit framework among first embodiment and its combo architectures that derives and realizes.Be without loss of generality, the example of negative impedance compensator 703 is the differential circuit frameworks that are formed in parallel by the negative impedance compensator in the example of two Fig. 6 in Fig. 7, represents the negative impedance compensator of these two parallel connections in Fig. 7 respectively with 703a and 703b.Following Fig. 8 decomposes the differential circuit framework of key diagram 7 again.
With reference to figure 8, the differential commentaries on classics impedance amplifier element 701 among Fig. 7 is to change the differential circuit framework that the resistance amplifier element is formed in parallel by two single-stages among Fig. 8, comprises that inspection optical diode 803 and two single-stages commentaries on classics hinder amplifier element 801a and 801b.In Fig. 8, the circuit structure of 801a and 703a is symmetrical in the circuit structure of 801b and 703b.In other words, the two ends of inspection optical diode 803,805a and 805b connect two symmetrical circuit structures respectively.
Fig. 9 is the simulation test result according to commentaries on classics impedance amplifier of the present invention, and wherein, this changes impedance amplifier is the commentaries on classics impedance amplifier of Fig. 6 example of a 3V1.25Gb, and is illustrated in the CMOS of 0.35 μ m.In Fig. 9, transverse axis is represented input optical power (input optical power), and unit is dBm; And the longitudinal axis represent bit error rate (bit error rate, BER).As shown in the figure, at bit error rate less than 10
-12The time, the application of dynamic range can be up to 30dBm from-29.5dBm to 0dBm.In addition, this frequency range lifting index that changes impedance amplifier can reach 3.
In sum, the commentaries on classics impedance amplifier with negative impedance compensate function of the present invention mainly comprises single-stage changes impedance amplifier or differential commentaries on classics resistance amplifier element and negative impedance compensator.This negative impedance compensator is connected in the output that this single-stage is changeed the impedance amplifier element, can be realized by multiple framework, and the equivalent impedance ground that this single-stage is changeed the impedance amplifier output is uprised by low, and compensates the parasitic capacitance effect that this output produces.The frequency range enhancer of commentaries on classics impedance amplifier of the present invention can reach 3, and the application of dynamic range can be up to 30dBm.
The above only is a most preferred embodiment of the present invention; can not limit practical range of the present invention according to this; every under the situation that does not break away from the disclosed scope and spirit of claims of the present invention, change of being done and modification all belong within the scope of patent protection of the present invention.
Claims (13)
1. commentaries on classics impedance amplifier with negative impedance compensate function includes:
Single-stage is changeed the impedance amplifier element, has output to produce equivalent impedance ground; And
The negative impedance compensator is connected in this output that this single-stage is changeed the impedance amplifier element, this equivalence impedance ground that this output produced is uprised by low, and compensate the parasitic capacitance effect that this output produces.
2. the commentaries on classics impedance amplifier with negative impedance compensate function as claimed in claim 1, wherein this negative impedance compensator comprises the negative-resistance device that is made of regenerative circuit, and the compensating circuit of the parasitic capacitance effect that produces at this output.
3. the commentaries on classics impedance amplifier with negative impedance compensate function as claimed in claim 2, wherein this compensating circuit is a negative capacitance.
4. the commentaries on classics impedance amplifier with negative impedance compensate function as claimed in claim 1, wherein this negative impedance compensator is to realize with the configuration that contains negative resistance in parallel and negative capacitance.
5. the commentaries on classics impedance amplifier with negative impedance compensate function as claimed in claim 1, wherein this single-stage commentaries on classics impedance amplifier element comprises inspection optical diode and basic operational amplifier.
6. the commentaries on classics impedance amplifier with negative impedance compensate function as claimed in claim 4, wherein this negative resistance is that configuration with transistor and electric capacity realizes.
7. the commentaries on classics impedance amplifier with negative impedance compensate function as claimed in claim 4, wherein this negative capacitance is that configuration with transistor, diode and electric capacity realizes.
8. commentaries on classics impedance amplifier with negative impedance compensate function includes:
Differential commentaries on classics resistance amplifier element is to be changeed the impedance amplifier element and connect the differential circuit framework that forms by two single-stages, and has two outputs; And
The negative impedance compensator is connected with these two outputs of this differential commentaries on classics resistance amplifier element, and compensates this two parasitic capacitance effect that output produced.
9. the commentaries on classics impedance amplifier with negative impedance compensate function as claimed in claim 8, wherein, this negative impedance compensator is the differential circuit framework that is formed in parallel by two symmetrical negative impedance compensating element,s.
10. the commentaries on classics impedance amplifier with negative impedance compensate function as claimed in claim 8, wherein, this differential commentaries on classics resistance amplifier element comprises inspection optical diode and two single-stages commentaries on classics resistance amplifier elements.
11. the commentaries on classics impedance amplifier with negative impedance compensate function as claimed in claim 9, wherein, each this negative impedance compensating element, is to realize with the configuration that contains negative resistance in parallel and negative capacitance.
12. the commentaries on classics impedance amplifier with negative impedance compensate function as claimed in claim 10, wherein, this negative resistance is that the configuration with transistor and electric capacity realizes.
13. the commentaries on classics impedance amplifier with negative impedance compensate function as claimed in claim 10, wherein, this negative capacitance is that the configuration with transistor, diode and electric capacity realizes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610004911 CN100536325C (en) | 2006-01-11 | 2006-01-11 | Transimpedance amplifier with negative impedance compensation function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610004911 CN100536325C (en) | 2006-01-11 | 2006-01-11 | Transimpedance amplifier with negative impedance compensation function |
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| Publication Number | Publication Date |
|---|---|
| CN101001079A true CN101001079A (en) | 2007-07-18 |
| CN100536325C CN100536325C (en) | 2009-09-02 |
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| CN 200610004911 Active CN100536325C (en) | 2006-01-11 | 2006-01-11 | Transimpedance amplifier with negative impedance compensation function |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101902203A (en) * | 2009-05-29 | 2010-12-01 | 英特赛尔美国股份有限公司 | Synthetic with the negative capacitance that differential circuit uses |
| CN103066929A (en) * | 2012-04-17 | 2013-04-24 | 凯钰科技股份有限公司 | High-speed transimpedance amplifier |
| CN104506785A (en) * | 2014-12-21 | 2015-04-08 | 天津大学 | Analog accumulator applied to TDI (time delay integral)-type CMOS (complementary metal-oxide-semiconductor transistor) image sensor |
| CN108900167A (en) * | 2018-07-11 | 2018-11-27 | 广州慧智微电子有限公司 | Impedance compensation circuit and power amplification compensation circuit |
| CN109981060A (en) * | 2019-03-14 | 2019-07-05 | 复旦大学 | Improve the method for capacitively coupled copped wave instrument amplifier noise and input impedance |
| WO2020177163A1 (en) * | 2019-03-07 | 2020-09-10 | 华南理工大学 | Chopper amplifying circuit employing negative impedance compensation technique |
| US11984859B2 (en) | 2019-03-07 | 2024-05-14 | South China University Of Technology | Chopper amplifying circuit employing negative impedance compensation technique |
-
2006
- 2006-01-11 CN CN 200610004911 patent/CN100536325C/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101902203A (en) * | 2009-05-29 | 2010-12-01 | 英特赛尔美国股份有限公司 | Synthetic with the negative capacitance that differential circuit uses |
| CN103066929A (en) * | 2012-04-17 | 2013-04-24 | 凯钰科技股份有限公司 | High-speed transimpedance amplifier |
| CN104506785A (en) * | 2014-12-21 | 2015-04-08 | 天津大学 | Analog accumulator applied to TDI (time delay integral)-type CMOS (complementary metal-oxide-semiconductor transistor) image sensor |
| CN104506785B (en) * | 2014-12-21 | 2017-09-29 | 天津大学 | Simulation accumulator applied to TDI type cmos image sensors |
| CN108900167A (en) * | 2018-07-11 | 2018-11-27 | 广州慧智微电子有限公司 | Impedance compensation circuit and power amplification compensation circuit |
| CN108900167B (en) * | 2018-07-11 | 2023-08-01 | 广州慧智微电子股份有限公司 | Impedance compensation circuit and power amplification compensation circuit |
| WO2020177163A1 (en) * | 2019-03-07 | 2020-09-10 | 华南理工大学 | Chopper amplifying circuit employing negative impedance compensation technique |
| US11984859B2 (en) | 2019-03-07 | 2024-05-14 | South China University Of Technology | Chopper amplifying circuit employing negative impedance compensation technique |
| CN109981060A (en) * | 2019-03-14 | 2019-07-05 | 复旦大学 | Improve the method for capacitively coupled copped wave instrument amplifier noise and input impedance |
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| Publication number | Publication date |
|---|---|
| CN100536325C (en) | 2009-09-02 |
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