Low-noise DC offset calibration circuit and related receiver...

Details Low-noise DC offset calibration circuit and related receiver... Low-noise DC offset calibration circuit and related receiver...

2011-06-07

2011-06-07

Nguyen, Khanh V (Department: 2817)

Amplifiers

With periodic switching input-output

C330S282000

Reexamination Certificate

active

07956680

ABSTRACT:
A DC offset calibration circuit has a first resistor, a first switch, a second resistor, and a second switch. The first resistor is coupled to a first supply voltage. The first switch is coupled to the first resistor, to a first input of an amplifier, and to a first input resistor. A second end of the first input resistor is not coupled to the first supply voltage. The second resistor is coupled to a second supply voltage. The second switch is coupled to the second resistor, to a second input of the amplifier, and to a first end of a second input resistor. A second end of the second input resistor is not coupled to the second supply voltage.

REFERENCES:
patent: 5742183 (1998-04-01), Kuroda
patent: 6407630 (2002-06-01), Yao et al.
patent: 6545534 (2003-04-01), Mehr
patent: 7012458 (2006-03-01), Roo
patent: 7057454 (2006-06-01), Ma et al.
patent: 7352238 (2008-04-01), Elwan

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