Charge coupling pipelined analogue-to-digital converter with error correction function

Abstract

The invention provides a charge coupling pipelined analogue-to-digital converter with error correction function. The analogue-to-digital converter comprises a charge coupling pipelined analogue-to-digital converter core, a common-mode error correction module, a differential mode error correction module, an input common-mode voltage offset compensation module and an error correction controller module. The charge coupling pipelined analogue-to-digital converter with error correction function can automatically detect differential mode error, common-mode error and input common-mode voltage offseterror which are caused by non-ideal characteristics in full-difference structure charge coupling pipelined analogue-to-digital converter and can correct the errors, the influence of the errors is controlled to be within the minimum resolution, so as to overcome the problem that restricts the accuracy of the existing charge coupling pipelined analogue-to-digital converter is restricted by errors caused by various non-ideal characteristics, and further the conversion accuracy of the existing charge coupling pipelined analogue-to-digital converter is improved.

Description

technical field [0001] The invention relates to a pipeline analog-to-digital converter, in particular to a charge-coupled pipeline analog-to-digital converter with various error calibration functions. Background technique [0002] With the continuous development of digital signal processing technology, the digitization and integration of electronic systems is an inevitable trend. However, most signals in reality are continuously changing analog quantities, which need to be transformed into digital signals through 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. made of. In applications such as broadband communications, digital high-definition television, and radar, systems require analog-to-digital converters with both very high sampling rates and resolutions. Portable terminal products in these application fields require not only...

AI Technical Summary

Problems solved by technology

[0011] Therefore, in order to realize a high-precision charge-coupled pipeline analog-to-digital converter with a fully differential structure with an accuracy of more than 10 bits, it is necessary to calibrate the differential mode errors and various common mode errors caused by the mismatch of components in the positive and negative signal processing paths. , to overcome the limitation of differential mode and common mode errors brought by various non-ideal characteristics on the performance of charge-coupled pipeline analog-to-digital converters

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