Sigma-delta class-D amplifier and control method for a...

Details Sigma-delta class-D amplifier and control method for a... Sigma-delta class-D amplifier and control method for a...

2011-03-22

2011-03-22

Pascal, Robert (Department: 2817)

Amplifiers

Modulator-demodulator-type amplifier

Reexamination Certificate

active

07911267

ABSTRACT:
A sigma-delta class-D amplifier includes a quantizer to quantize an input to produce a digital signal, and an output stage to produce an output according to the digital signal. The quantizer has a smaller step size so that the digital signal has at least five logical levels, and the sigma-delta class-D amplifier is thus improved to have wider stable modulation range and less switching loss.

REFERENCES:
patent: 7330069 (2008-02-01), Yamamura et al.

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