Feedforward Compensation Circuit for Input Common Mode Error of Pipeline Analog-to-Digital Converter

Abstract

The invention relates to a pipelined analog-to-digital converter input common mode error feed-forward compensation circuit, which comprises an input common mode error detection circuit, a programmable common mode compensation generation circuit and a common mode adjustment circuit, wherein the input common mode error detection circuit is used for detecting the common mode level of input signals and carrying out processing and the error amount of the input common mode signals is obtained; the programmable common mode compensation generation circuit is used for generating common mode compensation control voltage VFF according to the input common mode error amount; and the common mode adjustment circuit can adjust the common mode charge amount of a next-stage charge domain sub level circuit according to the common mode compensation control voltage VFF. Limitations of input differential signal common mode errors on dynamic performance of the existing charge domain pipelined analog-to-digital converter can be overcome effectively, the dynamic performance of the charge domain pipelined analog-to-digital converter can be improved, and occupancy of hardware resources can be reduced.

Description

technical field [0001] The present invention relates to a feed-forward compensation circuit, in particular to a feed-forward compensation circuit for the input mode error of a pipeline analog-to-digital converter, in particular to a feed-forward compensation circuit for the input common-mode error in a charge-domain pipeline analog-to-digital converter The monitoring and compensation circuit belongs to the technical field of pipeline analog-to-digital converters. Background technique [0002] With the continuous development of digital signal processing technology, the digitization and integration of electronic systems is an inevitable trend. However, the signals in reality are mostly continuously changing analog quantities, which need to be converted into digital signals by analog-to-digital conversion before they can be input into digital systems for processing and control. Therefore, analog-to-digital converters are indispensable in future digital system design missing co...

AI Technical Summary

Problems solved by technology

However, the adoption of this technology requires a large-scale digital control circuit and timing design, and it takes a lot of hardware resources to realize it on the chip.

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