DC offset calibration apparatus

Details DC offset calibration apparatus DC offset calibration apparatus

2007-09-18

2007-09-18

Nguyen, Patricia (Department: 2817)

Amplifiers

With periodic switching input-output

C330S002000, C330S307000

Reexamination Certificate

active

11162897

ABSTRACT:
A DC offset calibration device for calibrating a DC offset of an output signal of a gain stage, the DC offset calibration device includes: a digital-to-analog converter (DAC) electrically connected to the gain stage for generating an offset current according to the DC offset of the output signal of the gain stage; and a current-to-current converter electrically connected to the DAC and the gain stage for reducing the signal scale of the offset current to generate a compensation signal so as to reduce the DC offset at the output of the gain stage.

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patent: 7019504 (2006-03-01), Pullen et al.
patent: 7026866 (2006-04-01), Llewellyn

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