Amplifiers – Modulator-demodulator-type amplifier
Reexamination Certificate
2006-02-14
2006-02-14
JeanPierre, Peguy (Department: 2819)
Amplifiers
Modulator-demodulator-type amplifier
C330S291000, C341S143000
Reexamination Certificate
active
06998910
ABSTRACT:
An amplifier and a driver circuit therefor are presented for driving a load according to a system analog input. The amplifier comprises a passive delta-sigma modulator with a passive filter providing a first filtered signal according to a passive filter input and according to a feedback signal, a quantizer coupled with the passive filter and providing a quantized output according to the first filtered signal, and a switching system coupled with the the passive filter and the quantizer. The switching system selectively providing power to a load according to the quantized output and provides the feedback signal to the passive input, wherein a gain amplifier is provided in a feedback loop around the passive delta-sigma modulator.
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Haroun Baher
Hezar Rahmi
Brady III W. James
Jean-Pierre Peguy
Nguyen Khai M.
Stewart Alan K.
Telecky , Jr. Frederick J.
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