Multichannel analog-to-digital converter

Abstract

Multichannel successive approximation register (SAR) analog-to-digital converters (ADC), along with methods and systems for multichannel SAR analog-to-digital conversion, are disclosed herein. An exemplary multichannel SAR ADC can include a first SAR ADC for each of a plurality of input channels, and a second SAR ADC, a multiplexer, and a residue amplifier shared among the plurality of input channels. The multiplexer can select an analog residue signal from one of the first SAR ADCs for conversion by the second SAR ADC. The residue amplifier can amplify the selected analog residue signal. The second SAR ADC, multiplexer, and/or residue amplifier may be shared among all of the plurality of input channels. Where the multichannel SAR ADC includes N input channels, the second SAR ADC, multiplexer, and/or residue amplifier may be shared among b channels of the N input channels.

Description

Technical field [0001] The present disclosure generally relates to analog-to-digital converters, and more specifically, to multi-channel analog-to-digital converters. Background technique [0002] Multi-channel analog-to-digital converter (ADC) can receive and convert multiple analog signals into corresponding digital signals. Generally, various performance and / or equipment indicators (such as signal-to-noise ratio, throughput, equipment size, and / or test time) are balanced to achieve the best multi-channel analog-to-digital conversion. For example, a multi-channel ADC that achieves the best signal-to-noise ratio and throughput may occupy a larger device size than expected, while a multi-channel ADC that achieves the best device size generally suffers from loss of signal-to-noise ratio and throughput. Therefore, although multi-channel analog-to-digital converters have generally fully balanced various performance and / or equipment specifications, they have not been fully satisfact...

AI Technical Summary

Problems solved by technology

For example, a multi-channel ADC that achieves optimal SNR and throughput may occupy a larger device size than desired, and a multi-channel ADC that achieves optimal device size often suffers from a loss in SNR and throughput

Therefore, although multi-channel ADCs are usually well balanced for various performance and / or device specifications, they are not yet fully satisfactory in all respects

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