Pipeline structure analogue/digital converter of controlling input common-mode drift

Abstract

This invention relates to a mode number converter of a structure suppressing input of common-mode shift composed of an input sample maintainance circuit, 6 stage allowance gain pipelines, 7 sub-mode number converters, 6 sub-digifax converters, a pipeline output synchronous circuit and a connected digit correction circuit, among which, the sample maintainance circuit applies a switch technology of grid boostrap and an independent internal input / output common mode voltage structure at the forefront of the entire pipe line, the 7 sub-mode number converters generate 14 bits data output to get the last 8 bits quantization digit output via the synchronous and digit correction circuits.

Description

technical field [0001] The invention belongs to the technical field of integrated circuits, and in particular relates to a pipeline structure analog-to-digital converter capable of suppressing input signal common-mode voltage drift. Background technique [0002] The design of high-speed analog-to-digital converter is a bottleneck in mixed-signal SoC design, which consumes a lot of chip area, power consumption and design time. At the same time, high-speed medium-resolution analog-to-digital converters are widely used in high-speed data communications, liquid crystal display drivers, digital oscilloscopes, hard disk drive circuits, and high-definition television (HDTV). Early analog-to-digital converters of this type of structure were realized by double-click technology or BiCOMS technology. After the mid-1990s, due to the development of CMOS technology and the improvement of design technology, analog-to-digital converters realized by CMOS technology began to appear. Its adv...

AI Technical Summary

Problems solved by technology

This strict requirement on the common-mode voltage of the input signal increases the difficulty and cost of the design.

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