Common mode rejection calibration method for difference...

Details Common mode rejection calibration method for difference... Common mode rejection calibration method for difference...

2007-07-24

2009-08-04

Pascal, Robert (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

Reexamination Certificate

active

07570114

ABSTRACT:
A common mode rejection calibration scheme for use with a difference amplifier having an associated signal path. A signal is generated which varies with the common mode voltage of the differential input voltage applied to the amplifier. This signal is scaled and coupled into the signal path such that the scaled signal reduces the common-mode error that would otherwise be present in the difference amplifier's output.

REFERENCES:
patent: 6380807 (2002-04-01), Brokaw
patent: 6617838 (2003-09-01), Miranda et al.
patent: 6956727 (2005-10-01), Brokaw
patent: 7193464 (2007-03-01), Wang et al.
Ramón Pallás-Areny et al. ; “Common Mode Rejection Ratio in Differential Amplifiers”; IEEE Transactions on Instrumentation and Measurement; vol. 40, No. 4; Aug. 1991; pp. 669-676.

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