Patent Number: 6,310,571

Title: Multiplexed multi-channel bit serial analog-to-digital converter

Abstract: A circuit includes an analog-to-digital (A/D) converter for multiplexing between a number of analog input signals and converting the selected analog input signals to a digital code representation. The A/D converter includes a comparator having a first input terminal connected to receive the first signal having a number of levels, a second input terminal connected to receive a multiple number of analog input signals, and a third input terminal for receiving a multiple number of input select signals. The comparator includes a multiplexer coupling the multiple number of analog input signals to a multiple number of corresponding input signal paths. The multiplexer selects one of the multiple number of input signal paths based on the multiple number of input select signals. In one embodiment, the A/D converter is applied in a digital image sensor for performing pixel-level analog-to-digital conversion using a multi-channel bit serial ADC technique.

Inventors: Yang; David Xiao Dong (Mountain View, CA), Bidermann; William R. (Los Gatos, CA)

Assignee: PiXim, Incorporated

International Classification: H03M 1/12 (20060101); H03M 1/56 (20060101); H03M 1/50 (20060101); H03M 001/38 ()

Expiration Date: 10/30/2018