Integrator and error amplifier

Details Integrator and error amplifier Integrator and error amplifier

2007-07-24

2009-06-30

Pascal, Robert (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C327S336000

Reexamination Certificate

active

07554400

ABSTRACT:
An integrator is provided with protection against drift in the value of an integral during power save mode. An N-bit counter (12) is driven by the output of a comparator (11) to provide a digital count representation of the integral. The digital count is fed as an input to a current-steering digital-to-analog converter (14) which provides a current of corresponding analog magnitude to other circuitry, such as to an input stage of an error amplifier. The digital count is maintained during power save mode, preserving the integral value until resumption of normal operation.

REFERENCES:
patent: 4360787 (1982-11-01), Galpin
patent: 4395681 (1983-07-01), Hornung et al.
patent: 6188498 (2001-02-01), Link et al.
patent: 2004/0075462 (2004-04-01), Kizer et al.
patent: 2006/0044065 (2006-03-01), Ishida
patent: 24 48 925 (1976-04-01), None
patent: 05037808 (1993-02-01), None
patent: 1 387 479 (2004-02-01), None
patent: 2 243 222 (1991-10-01), None

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