A time-domain interleaved analog-to-digital converter and electronic equipment

Abstract

The invention discloses a time-domain interleaving analog-to-digital converter and electronic equipment. The time-domain interleaving analog-to-digital converter includes a plurality of parallel-connected sub-ADC converters, a reference ADC converter, and a plurality of calibration modules, wherein the plurality of calibration The module is connected with multiple sub-ADC converters one by one to form multiple sub-ADC channels. The reference ADC converter simultaneously converts the analog signal sampled by each sub-ADC converter into a reference digital signal and outputs it to the corresponding calibration module. Each calibration module is based on The received digital signal and the corresponding reference digital signal perform self-calibration work. By controlling the clock signal, the sampling time of the reference ADC is continuously aligned with the sampling time of each sub-ADC converter, so that each calibration module performs self-calibration in a cyclic iteration. The transfer characteristic of each sub-ADC channel is infinitely close to the transfer characteristic of the reference ADC converter, thereby solving the problem of mismatch between each sub-ADC channel.

Description

technical field [0001] The invention relates to the technical field of electronic communication, in particular to a time-domain interleaving analog-to-digital converter and electronic equipment. Background technique [0002] Current communication technology applications require GHz-level ADC converters (Analog-to-Digital Converters, analog-to-digital converters). It is difficult for a single-channel ADC converter to achieve such a high speed, but multiple ADC converters can be used in time The alternate working principle realizes an ADC converter whose rate is a multiple of the rate of a single-channel ADC converter. This is a multi-channel time-domain interleaved ADC converter; There is a process error between the sub-ADC converters and the aging degree of each sub-ADC converter is different, resulting in a mismatch problem between each sub-ADC channel, which affects the performance of the multi-channel time-domain interleaved ADC converter. Contents of the invention [...

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Problems solved by technology

[0003] The main purpose of the present invention is to provide a time-domain interleaved analog-to-digital converter, which aims to solve the problem of mismatch between the various sub-ADC converters of the multi-channel time-domain interleaved ADC converter, so as to improve the time-domain interleaved analog-to-digital conversion device performance

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