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Photoreceiver preamplifier circuit with high sensitivity and wide dynamic range

A technology of preamplifier circuit and wide dynamic range, which is applied in the field of preamplifier circuit of high-sensitivity wide dynamic range optical receiver and transimpedance preamplifier circuit, can solve problems such as complex structure and adverse effect of circuit noise performance, and achieve Reduce node impedance, improve input dynamic range, and reduce the effect of Miller effect

Inactive Publication Date: 2019-03-22
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the transimpedance amplifier must have a corresponding automatic gain control (AGC) and DC offset adjustment mechanism, but the mainstream DC offset adjustment circuit often has an adverse effect on the noise performance of the circuit or the structure is too complicated

Method used

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  • Photoreceiver preamplifier circuit with high sensitivity and wide dynamic range
  • Photoreceiver preamplifier circuit with high sensitivity and wide dynamic range
  • Photoreceiver preamplifier circuit with high sensitivity and wide dynamic range

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0039] Such as figure 1 As shown, a high sensitivity wide dynamic range optical receiver preamplifier circuit mainly includes photodiode (PD), transimpedance amplifier (TIA), single-ended to differential amplifier (Single-ended to differential amplifier, SD Amp), Output buffer circuit (Driver), peak-value detection circuit (Peak-value detection, PVD) and DC offset cancellation (DOC) circuit.

[0040] The photodiode PD converts optical signals of different powers into currents of corresponding magnitudes, one end of which is connected to the power supply, and the other end is respectively connected to one end of a transimpedance amplifier (TIA) and a direct current vanishing modulation circuit (DOC);

[0041] The front end of the transimpedance amplifier (TIA) is connected with a photodiode (PD), the current signal transmitted by the photodiode (PD) is converted into a voltage signal, and it is connected with a single-ended to differential amplifier (SD Amp) through a single-ended ...

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Abstract

The invention discloses a photoreceiver preamplifier circuit with high sensitivity and a wide dynamic range. The circuit comprises a photodiode, a trans-impedance amplifier, a single-end-to differential amplifier, an output buffer circuit, a peak detection circuit and a direct current maladjustment eliminating circuit. Aiming at the input stage trans-impedance amplifier of the photoreceiver preamplifier circuit, the technical scheme designs a novel three-stage push-pull inverter structure, has the characteristics of high gain and low noise, and improves the sensitivity of the preamplifier; a virtual zero point is designed in a feedback loop, so that the work rate of the trans-impedance amplifier is improved, and the stability is increased; provides is a new automatic gain control technology with an adaptive function, so that the trans-impedance amplifier keeps bandwidth invariable and keeps the loop stable under the different optical input powers, and has the characteristic of wide dynamic range.

Description

Technical field [0001] The invention belongs to the field of photoelectric integrated circuits in optical fiber communication, and relates to a transimpedance preamplifier circuit, in particular to a high sensitivity wide dynamic range optical receiver preamplifier circuit. Background technique [0002] With the rapid development of optical fiber communication, it has effectively promoted the wide application of optical communication products, and at the same time put forward strict requirements on its performance. The optical receiver chip is an important part of the optical communication system, and its performance (including sensitivity, dynamic range, etc.) is related to the transmission quality of the optical signal. Among them, the Transimpedence Amp (TIA) is located at the front end of the receiver and is the most important chip in the optical receiver. Its noise and dynamic range performance directly determine the sensitivity and dynamic range of the optical receiver. It...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/14H03F1/32H03F3/08H03F3/45H03G3/30
CPCH03F1/14H03F1/3211H03F3/082H03F3/45179H03G3/3084H03F2203/45051
Inventor 朱铁柱杜环利季仁东王马华张宇林唐永锋居永峰杨潇魏丹丹于银山杨伟强王珣
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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