Patent Number: 7,786,767

Title: Common-mode insensitive sampler

Abstract: An approach to rejecting input common-mode voltage variations in a sampler/converter that avoids the use of a differential amplifier in the signal path, and without introducing added distortion or noise. In one embodiment, the input common-mode variations are sensed on a pair of matched resistors that straddle the common mode analog inputs, on a node `Vcmi`. An alternative, switched-capacitor-based sensing scheme is also possible. Using this measured Vcmi, adjustments are then made to the rest of the sampler/converter to take out any variations observed at Vcmi.

Inventors: Kushner; Lawrence J. (Andover, MA), Anthony; Michael P. (Andover, MA), Fisher; John S. (Medford, MA)

Assignee: Kenet, Inc.

International Classification: G11C 27/02 (20060101)

Expiration Date: 8/31/12018