Patent ID: 7218264
Filing Date: 2007-05-15
Classification: H03M

Abstract:
1. An analog-to-digital converter comprising a plurality of analog stages, each said stage producing, in response to an analog input thereto: (a) a digital output that corresponds to a most significant bit of said analog input of said each stage; and (b) an analog output that corresponds to a remainder of said analog input of said each stage relative to said most significant bit of said analog input of said each stage; wherein said analog input of every said stage except for a first said stage is said analog output of a preceding said stage; and wherein each said stage includes: (a) an analog adder for subtracting half of a full-scale input of said each stage from said analog input of said each stage; (b) an analog amplifier; and (c) a switch for selecting, as input to said analog amplifier: