High-speed CMOS monolithically integrated optical receiver with full bandwidth single-ended-to-differential

Abstract

The invention discloses a high-speed CMOS monolithically integrated optical receiver with full bandwidth single-ended-to-differential, comprising a high bandwidth adjustment type cascode transimpedance amplifier used for converting a current signal output by a photoelectric detector into a voltage signal and preliminarily amplifying the voltage signal; a single-ended-to-differential device provided with a negative capacitance circuit and used for achieving single-ended-to-differential conversion and increasing a bandwidth and an amplified voltage signal; a DC offset eliminating unit used for eliminating a DC offset of an interleaved active feedback limiting amplifier caused by an unbalanced signal output by the single-ended-to-differential device and ensuring a uniform common mode level for the interleaved active feedback limiting amplifier; the interleaved active feedback limiting amplifier, used for amplifying the voltage signal output by the high bandwidth adjustment type cascode transimpedance amplifier to a voltage level required by a digital processing unit; and an output buffer stage used for providing driving ability. While improving the circuit gain, the high-speed CMOS monolithically integrated optical receiver disclosed by the invention is used for expanding the working bandwidth and overcoming the shortcomings in the prior art.

Description

technical field [0001] The invention relates to the field of optical fiber communication system and optical interconnection, in particular to a high-speed CMOS single-chip integrated optical receiver based on an adjustable cascode (RGC) circuit structure and full bandwidth single-end to differential conversion. Background technique [0002] As human society's demand for network bandwidth and data traffic increases exponentially. The ultra-high-speed and ultra-large-capacity optical fiber communication technology for trunk network transmission has made breakthroughs, but electronic information processing is still used for short-distance communication between cabinets, circuit boards, chips, and inside chips of optical network switching nodes. And exchange methods, which limit the further improvement of information processing speed. Therefore, in short distances and very short distances, it has become an inevitable trend to replace electrical interconnections with optical int...

AI Technical Summary

Problems solved by technology

In the design process of transimpedance amplifiers, bandwidth and noise are contradictory, and it is difficult to find a solution that is both excellent

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