CN104852769B - It is a kind of to be applied to phase splitters of the photoreceiver front-end TIA with RSSI - Google Patents
It is a kind of to be applied to phase splitters of the photoreceiver front-end TIA with RSSI Download PDFInfo
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- CN104852769B CN104852769B CN201510162764.5A CN201510162764A CN104852769B CN 104852769 B CN104852769 B CN 104852769B CN 201510162764 A CN201510162764 A CN 201510162764A CN 104852769 B CN104852769 B CN 104852769B
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Abstract
The invention provides a kind of applied to phase splitters of the photoreceiver front-end TIA with RSSI, including：Trans-impedance amplifier, mirror image trans-impedance amplifier, high-speed-differential circuit, low frequency differential feedback network and current mirror；Wherein mirror image trans-impedance amplifier, high-speed-differential circuit, low frequency differential feedback network constitute negative feedback network；Photo-signal is converted into single-ended voltage signal and inputs the high-speed-differential circuit by the trans-impedance amplifier；The fully differential voltage signal of high-speed-differential circuit output output light electric current mean value signal after low frequency differential feedback network inputs mirror image trans-impedance amplifier and current mirror respectively；The DC component of mirror image trans-impedance amplifier output single-ended voltage signal is to the high-speed-differential circuit, the current mirror output light electric current mean value signal.
Description
Technical field
The present invention relates to the phase splitter of optical communication field, more particularly to trans-impedance amplifier.
Background technology
Trans-impedance amplifier is the electronic circuit that current signal is changed into voltage signal and amplified, frequently as optic communication
The front-end circuit of chip is received, in order to reduce the susceptibility to power supply and Earth noise, the electric signal of conversion is necessary for differential signal.
Therefore across resistance amplifying circuit inside, in order to which single-ended electric signal is changed into differential signal, it is necessary to which one singly turns double circuit, i.e.,
Phase splitter.
It is the current necessary function of TIA products and optical power monitoring function is RSSI functions, its purpose is by inspection
The photogenerated current for surveying PD carrys out monitoring optical power.Typical phase splitter and light power detection circuit are as shown in figure 1, the two functions
Circuit is relatively independent.
The content of the invention
Technical problem underlying to be solved by this invention is to provide a kind of point with RSSI applied to photoreceiver front-end TIA
Circuitry phase, phase splitter and optical power monitoring are integrated in a circuit.
In order to solve above-mentioned technical problem, the invention provides a kind of photoreceiver front-end TIA that is applied to RSSI's
Phase splitter, including：Trans-impedance amplifier, mirror image trans-impedance amplifier, high-speed-differential circuit, low frequency differential feedback network and electric current
Mirror；Wherein mirror image trans-impedance amplifier, high-speed-differential circuit, low frequency differential feedback network constitute negative feedback network；
Photo-signal is converted into single-ended voltage signal and inputs the high-speed-differential circuit by the trans-impedance amplifier；It is described
The fully differential voltage signal of high-speed-differential circuit output output light electric current mean value signal after low frequency differential feedback network is distinguished
Input mirror image trans-impedance amplifier and current mirror；The DC component of mirror image trans-impedance amplifier output single-ended voltage signal is to described
High-speed-differential circuit, the current mirror output light electric current mean value signal.
In a preferred embodiment：The output end of the mirror image trans-impedance amplifier is grounded by the first electric capacity C1, eliminates mirror
Noise in the d. c. voltage signal exported as trans-impedance amplifier.
In a preferred embodiment：The current mirror is four metal-oxide-semiconductor M0', M1' and M0, M1The cascode current of composition
Mirror；The MON ends of the current mirror are directly connected to a resistive load with ground terminal.
In a preferred embodiment：The high-speed-differential circuit includes the first amplifier I0 and the second amplifier I1, described second
Amplifier I1 two output ends are connected by a resistance Rf with low frequency differential feedback network respectively.
In a preferred embodiment：The low frequency differential feedback network includes the 3rd amplifier I2, four high guaily unit I3 and the 5th
Amplifier I4, the 3rd amplifier I2 two inputs and output end directly connect the second electric capacity Cf respectively, the 5th amplifier I4's
Output end is grounded by a compensating electric capacity C2.
Compared to prior art, technical scheme possesses following beneficial effect：
The invention provides it is a kind of be applied to phase splitters of the photoreceiver front-end TIA with RSSI, can realize simultaneously by
Photo-signal changes into fully differential voltage signal and monitoring photoelectric current two functions of average, simplifies circuit and reduces core
Piece area.And present invention employs the mode that photoelectric current average is detected at PINA ends, compatibility is applied to VPD and APD encapsulation
Form.
Brief description of the drawings
Fig. 1 is the circuit diagram of prior art；
Fig. 2 is principle logic chart in the embodiment of the present invention；
Fig. 3 is circuit structure diagram in the embodiment of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention will be further described.
It is a kind of applied to phase splitters of the photoreceiver front-end TIA with RSSI with reference to Fig. 2, including：Trans-impedance amplifier, mirror
As trans-impedance amplifier, high-speed-differential circuit, low frequency differential feedback network and current mirror；Wherein mirror image trans-impedance amplifier, high speed difference
Parallel circuit, low frequency differential feedback network constitute negative feedback network；
Photo-signal is converted into single-ended voltage signal and inputs the high-speed-differential circuit by the trans-impedance amplifier；It is described
The fully differential voltage signal of high-speed-differential circuit output output light electric current mean value signal after low frequency differential feedback network is distinguished
Input mirror image trans-impedance amplifier and current mirror；The DC component of mirror image trans-impedance amplifier output single-ended voltage signal is to described
High-speed-differential circuit, the current mirror output light electric current mean value signal.
With further reference to Fig. 3, in the present embodiment, the output end of the mirror image trans-impedance amplifier is connect by the first electric capacity C1
Ground, eliminates the noise in the d. c. voltage signal of mirror image trans-impedance amplifier output.
The current mirror is four metal-oxide-semiconductor M0', M1' and M0, M1The common-source common-gate current mirror of composition；The current mirror
MON ends are directly connected to a resistive load with ground terminal.
The high-speed-differential circuit includes the first amplifier I0 and the second amplifier I1, two output ends of the second amplifier I1
It is connected respectively by a resistance Rf with low frequency differential feedback network.
The low frequency differential feedback network includes the 3rd amplifier I2, the amplifier I4 of four high guaily unit I 3 and the 5th, the 3rd fortune
Put I2 two inputs and output end directly connect respectively the second electric capacity Cf, the 5th amplifier I4 output end pass through one compensation electricity
Hold C2 ground connection.
The operation principle of foregoing circuit is：The photogenerated current I of photoelectric detector PDPD, it is a random binary digit letter
Number, ifFor its average value.Current signal is changed into single-ended voltage signal V by trans-impedance amplifiernet1If,For its average.
If the gain of high-speed-differential circuit is Ahs, I2,I3Gain A2A3, M0Mutual conductance be gM0, trans-impedance amplifier is with mirror image across resistance amplification
Device is R across hinderingTIAIf the loop gain of whole negative feedback network is ALG.It can obtain：
ALG=-Ahs*A2*A3*gM0*RTIA
Therefore OUTP and OUTN will be exported and be balanced fully differential signal, due to the effect of negative-feedback, OUTP and OUTN direct current
Imbalance can be suppressed, and current mirror can detect the average value of photo-signal.
The gain bandwidth product of loop determines the lower-cut-off frequency of whole circuit：
Therefore, it is above-mentioned it is a kind of be applied to phase splitters of the photoreceiver front-end TIA with RSSI, can realize light simultaneously
Current signal changes into fully differential voltage signal and monitoring photoelectric current two functions of average, simplifies circuit and reduces chip
Area.And present invention employs the mode that photoelectric current average is detected at PINA ends, compatibility is applied to VPD and APD encapsulation shape
Formula.
The foregoing is intended to be a preferred embodiment of the present invention, but protection scope of the present invention is not limited thereto,
Any one skilled in the art the invention discloses technical scope in, the change or replacement that can be readily occurred in,
It should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with scope of the claims
It is defined.
Claims (5)
1. a kind of be applied to phase splitters of the photoreceiver front-end TIA with RSSI, it is characterised in that including：Trans-impedance amplifier, mirror
As trans-impedance amplifier, high-speed-differential circuit, low frequency differential feedback network and current mirror；Wherein mirror image trans-impedance amplifier, high speed difference
Parallel circuit, low frequency differential feedback network constitute negative feedback network；
Photo-signal is converted into single-ended voltage signal and inputs the high-speed-differential circuit by the trans-impedance amplifier；The high speed
The fully differential voltage signal of difference channel output output light electric current mean value signal after low frequency differential feedback network is inputted respectively
Mirror image trans-impedance amplifier and current mirror；The DC component of mirror image trans-impedance amplifier output single-ended voltage signal is to the high speed
Difference channel, the current mirror output light electric current mean value signal.
2. according to claim 1 a kind of applied to phase splitters of the photoreceiver front-end TIA with RSSI, its feature exists
In：The output end of the mirror image trans-impedance amplifier is grounded by the first electric capacity C1, eliminates the direct current of mirror image trans-impedance amplifier output
Noise in voltage signal.
3. according to claim 1 a kind of applied to phase splitters of the photoreceiver front-end TIA with RSSI, its feature exists
In：The current mirror is four metal-oxide-semiconductor M0', M1' and M0, M1The common-source common-gate current mirror of composition；The MON ends of the current mirror with
Ground terminal is directly connected to a resistive load.
4. according to claim 1 a kind of applied to phase splitters of the photoreceiver front-end TIA with RSSI, its feature exists
In：Two output ends that the high-speed-differential circuit includes the first amplifier I0 and the second amplifier I1, the second amplifier I1 are distinguished
It is connected by a resistance Rf with low frequency differential feedback network.
5. according to claim 4 a kind of applied to phase splitters of the photoreceiver front-end TIA with RSSI, its feature exists
In：The low frequency differential feedback network includes the 3rd amplifier I2, four high guaily unit I3 and the 5th amplifier I4, the 3rd amplifier I2's
The second electric capacity Cf is connected respectively between electrode input end and output end, between negative input and output end, the 5th amplifier I4's
Output end is grounded by a compensating electric capacity C2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510162764.5A CN104852769B (en) | 2015-04-08 | 2015-04-08 | It is a kind of to be applied to phase splitters of the photoreceiver front-end TIA with RSSI |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510162764.5A CN104852769B (en) | 2015-04-08 | 2015-04-08 | It is a kind of to be applied to phase splitters of the photoreceiver front-end TIA with RSSI |
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| Publication Number | Publication Date |
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| CN104852769A CN104852769A (en) | 2015-08-19 |
| CN104852769B true CN104852769B (en) | 2017-07-11 |
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| CN201510162764.5A Active CN104852769B (en) | 2015-04-08 | 2015-04-08 | It is a kind of to be applied to phase splitters of the photoreceiver front-end TIA with RSSI |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105610509B (en) * | 2015-12-21 | 2018-05-01 | 北京航天时代光电科技有限公司 | A kind of 160M optical transmission devices |
| CN106936398B (en) * | 2017-02-27 | 2019-06-07 | 烽火通信科技股份有限公司 | A kind of RSSI circuit for trans-impedance amplifier |
| CN107290266A (en) * | 2017-07-13 | 2017-10-24 | 上海厦泰生物科技有限公司 | A kind of FSC reception systems of flow cytometer |
| CN109039473B (en) * | 2018-07-26 | 2020-05-22 | 光梓信息科技（上海）有限公司 | Front-end circuit of high-speed optical receiver and low-noise processing method thereof |
| CN110086434A (en) * | 2019-02-28 | 2019-08-02 | 厦门优迅高速芯片有限公司 | A kind of circuit promoted across RSSI foot anti-noise ability in resistance amplifying circuit |
| EP3982535A4 (en) | 2019-06-29 | 2022-06-29 | Huawei Technologies Co., Ltd. | Rc oscillator |
| CN115314104B (en) * | 2022-08-09 | 2024-03-12 | 无锡飞龙九霄微电子有限公司 | Low-noise RSSI circuit and working method thereof |
| CN115580348B (en) * | 2022-11-24 | 2023-04-21 | 厦门优迅高速芯片有限公司 | Photocurrent mirror image monitoring circuit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6528777B2 (en) * | 2001-01-16 | 2003-03-04 | International Business Machines Corporation | Optical power meter derived from common-mode voltage of optical transimpedance amplifier |
| CN1871798A (en) * | 2003-08-20 | 2006-11-29 | 英特尔公司 | Transimpedance amplifier with receive signal strength indicator |
| CN101848026A (en) * | 2009-03-25 | 2010-09-29 | 冲电气工业株式会社 | Receiving method and device |
| CN102324899A (en) * | 2011-08-24 | 2012-01-18 | 成都优博创技术有限公司 | Transresistance amplifier with received signal strength indication (RSSI) function |
| CN204559585U (en) * | 2015-04-08 | 2015-08-12 | 厦门优迅高速芯片有限公司 | Be applied to the phase splitter that photoreceiver front-end TIA is with RSSI |
-
2015
- 2015-04-08 CN CN201510162764.5A patent/CN104852769B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6528777B2 (en) * | 2001-01-16 | 2003-03-04 | International Business Machines Corporation | Optical power meter derived from common-mode voltage of optical transimpedance amplifier |
| CN1871798A (en) * | 2003-08-20 | 2006-11-29 | 英特尔公司 | Transimpedance amplifier with receive signal strength indicator |
| CN101848026A (en) * | 2009-03-25 | 2010-09-29 | 冲电气工业株式会社 | Receiving method and device |
| CN102324899A (en) * | 2011-08-24 | 2012-01-18 | 成都优博创技术有限公司 | Transresistance amplifier with received signal strength indication (RSSI) function |
| CN204559585U (en) * | 2015-04-08 | 2015-08-12 | 厦门优迅高速芯片有限公司 | Be applied to the phase splitter that photoreceiver front-end TIA is with RSSI |
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| CN104852769A (en) | 2015-08-19 |
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