Time domain interleaved analog-to-digital converter and electronic equipment

Abstract

The invention discloses a time domain interleaved analog-to-digital converter and electronic equipment. The time domain interleaved analog-to-digital converter comprises a plurality of sub ADC converters arranged in parallel, a reference ADC converter and a plurality of calibration modules, wherein the plurality of calibration modules are connected with the plurality of sub ADC converters one by one; multiple sub ADC channels are formed, the reference ADC converter converts analog signals sampled by the sub ADC converters into reference digital signals at the same time and outputs the reference digital signals to the corresponding calibration modules, each calibration module carries out self-calibration work according to the received digital signal and the corresponding reference digital signal; and the sampling time of the reference ADC is enabled to be continuously aligned with the sampling time of each sub ADC converter by controlling a clock signal, so that each calibration moduleperforms self-calibration in a loop iteration manner, the transmission characteristics of each sub ADC channel are infinitely close to the transmission characteristics of the reference ADC converter,and the problem of mismatch among the sub ADC channels is solved.

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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