Amplifiers – With periodic switching input-output
Reexamination Certificate
2008-07-07
2010-06-15
Nguyen, Khanh V (Department: 2817)
Amplifiers
With periodic switching input-output
C330S086000
Reexamination Certificate
active
07737775
ABSTRACT:
A receiver stage has an operational amplifier, a feedback resistor coupled between an output of the operational amplifier and an input of the operational amplifier, and a DC offset calibration circuit. The DC offset calibration circuit includes a plurality of resistors and a plurality of switches. Each resistor has a first end coupled to a supply voltage. First ends of each of the switches are coupled to second ends of each of the resistors, respectively, and second ends of the switches are coupled to the input of the operational amplifier.
REFERENCES:
patent: 6545534 (2003-04-01), Mehr
patent: 7012458 (2006-03-01), Roo
patent: 7352238 (2008-04-01), Elwan et al.
Lin Yu-Hsin
Lo Chi-Lun
Hsu Winston
Mediatek Inc.
Nguyen Khanh V
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