Programmable gain amplifier with self-adjusting offset...

Details Programmable gain amplifier with self-adjusting offset... Programmable gain amplifier with self-adjusting offset...

2007-11-27

2007-11-27

Anderson, Matthew (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S248100, C330S200000

Reexamination Certificate

active

10329187

ABSTRACT:
Briefly, in accordance with one embodiment of the invention, a calibration circuit may detect a difference between first and second outputs of a differential output programmable gain amplifier to determine a dc offset at the differential output. In the event an offset is detected, a differential gain of the programmable gain amplifier may be adjusted until the offset is adjusted, or eliminated, to an acceptable predetermined value.

REFERENCES:
patent: 5233309 (1993-08-01), Spitalny et al.
patent: 5812023 (1998-09-01), Jones
patent: 6320898 (2001-11-01), Newson et al.
patent: 6400308 (2002-06-01), Bell et al.
patent: 6563445 (2003-05-01), Sabouri
patent: 2002/0094792 (2002-07-01), Oono et al.
patent: 354097727 (1979-08-01), None

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