Signal offset cancellation

Details Signal offset cancellation Signal offset cancellation

2008-05-06

2008-05-06

Le, Dinh T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Amplitude control

C330S009000

Reexamination Certificate

active

11323372

ABSTRACT:
Techniques and circuitry are provided for programmably controlling signal offsets in integrated circuitry. In one embodiment, an integrated circuit includes a signal offset cancellation circuit that is programmably selected to control the offset of signals on either one input/output or another input/output of an amplifier circuit. In one embodiment, a logic circuit is used to selectively couple a bank of current sources to one input/output or another input/output of a differential amplifier through a switching circuit. The bank of current sources may employed to control the signal offset on either input/output, or may be decoupled from all of the inputs/outputs when signal offset cancellation is not required.

REFERENCES:
patent: 4833418 (1989-05-01), Quintus et al.
patent: 5410270 (1995-04-01), Rybicki et al.
patent: 5631603 (1997-05-01), Stubbe et al.

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