US 7,064,700 B1 · Multi-channel analog to digital converter

Abstract

A pipelined analog to digital converter (“ADC”) as described herein is capable of processing two or more input channels. The analog input voltages from the multiple channels are concurrently sampled (every other clock phase) using isolated input stages. The outputs of the input stages are concurrently sampled (every other clock phase) by a delay/holding and synchronization (“DHS”) stage. The DHS stage processes the samples using a double sampling technique, generates residual voltage samples (every clock phase), and generates digital outputs for the multiple channels in an alternating manner. The DHS stage provides equal input loading for the input stages, which enhances the performance of the ADC.

Claims23

Dependent claims

A multi-channel analog to digital converter (“ADC”) comprising:

a plurality of input stages configured to concurrently sample a plurality of input voltage signals, and to concurrently provide a plurality of voltage sample sequences, said plurality of voltage sample sequences being derived from said plurality of input voltage signals;
and
a delay/holding and synchronization (“DHS”) stage coupled to said plurality of input stages, said DHS stage being configured to concurrently sample said plurality of voltage sample sequences to obtain a plurality of DHS voltage sample sequences, and to alternately process said plurality of DHS voltage sample sequences.

Dependencies are inferred from the claim text.

Multi-channel analog to digital converter

Life of this patent

Multi-channel analog to digital converter

Life of this patent

Abstract

Claims23