MULTICHANNEL ANALOG-TO-DIGITAL CONVERTER

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. 本文公开了多通道逐次逼近寄存器(SAR)模拟-数字转换器与用于多通道SAR模拟-数字转换的方法和系统。示例性多通道SAR ADC可以包括用于多个输入通道的每个的第SAR ADC和在多个输入通道间共享的第二SAR ADC、复用器和残余放大器。复用器可以从第SAR ADC中的个选