Patent ID: 7379012

Claim:
A pipelined analog-to-digital converter (ADC) comprising: a first stage that receives an input voltage signal and that comprises an analog-to-digital converter (ADC) that includes: an amplifier having an input and an output; N capacitances that are connected in parallel and that include first ends that selectively communicate with said input of said amplifier and second ends; N switches that selectively connect said second ends of said N capacitances to said voltage input during a first phase, one of said second ends of said N capacitances to said output of said amplifier during a second phase, and others of said second ends of said N capacitances to one of a voltage reference and a reference potential during said second phase, wherein each of said second ends of said N capacitances is selectively connectable to said output of said amplifier; and a second stage that communicates with said output said amplifier.