Filter compensation for switching amplifiers

Details Filter compensation for switching amplifiers Filter compensation for switching amplifiers

2011-05-24

2011-05-24

Mottola, Steven J (Department: 2817)

Amplifiers

Modulator-demodulator-type amplifier

C330S20700P

Reexamination Certificate

active

07948308

ABSTRACT:
Embodiments of the present invention provide methods and systems for limiting bipolar current flow in a switching amplifier. Embodiments of the present invention are directed to a multi-referenced switching amplifier. In some embodiment, the switching amplifier is a dual referenced switching amplifier comprising a regulator between the two references, where the first reference provides coarse modulation to a load and the second reference provides fine modulation to the load. The dual referenced switching amplifiers comprise the output filters made up of an inductor and a capacitor. In some embodiments, fine modulation is not applied to the load, thus limiting bipolar current flow induced by the filter inductors.

REFERENCES:
patent: 6005316 (1999-12-01), Harris
patent: 6259317 (2001-07-01), Melanson
patent: 6492868 (2002-12-01), Kirn
patent: 6535058 (2003-03-01), Kirn
patent: 6593807 (2003-07-01), Groves, Jr. et al.
patent: 6937090 (2005-08-01), Kirn
patent: 7132886 (2006-11-01), Kirn
patent: 2006/0049869 (2006-03-01), Meng et al.

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