Schottky type standard CMOS whole differential photoelectric integration receiver

Abstract

The invention belongs to the field of an optical communication system and optical interconnection, and relates to a Schottky type standard CMOS total difference opto-electronic integrated receiver, a Schottky type total difference optical detector, a total difference transimpedance preamplifier, a total difference limiting amplifier and a difference-to-single-end output buffer stage, wherein, structures, shapes, sizes and areas of two Schottky type opto-electronic detectors of the Schottky type total difference optical detector are same and the positions thereof are symmetrical; the two Schottky type opto-electronic detectors are adjacent with the smallest clearance allowed by the manufacturing technique and form a light acceptance area which is approximately a square; and two light generated currents have equal amount but different directions. The optical receiver realizes total difference characteristics of the standard CMOS difference optical receiver, can realize single chip integration and can improve the optical receiving speed and sensitivity.

Description

technical field [0001] The invention belongs to the field of optical communication system and optical interconnection, and relates to a Schottky type full differential photoelectric integrated receiver fully compatible with standard CMOS technology with Schottky contact. Background technique [0002] In short-distance and very short-distance optical communication and high-speed optical communication occasions such as optical interconnection, the use of silicon-based standard CMOS technology to realize monolithic optoelectronic integrated receivers has become a hot topic for many scholars. But up to now, there have been no reports of silicon-based standard CMOS optoelectronic integrated receivers that meet the practical requirements. restricted. [0003] In addition, in high-speed circuits, it is generally necessary to adopt a fully differential structure to improve the stability of the circuit, overcome various common-mode noise interference, and increase sensitivity. Howe...

AI Technical Summary

Problems solved by technology

The disadvantage of this structure is that it not only leads to the inconsistency or balance of the two input loads of the differential optical receiver, which reduces the bandwidth, but also makes one of the two differential branches of the differential optical receiver have no light-generated current signal input, Reduced sensitivity

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