Method of and apparatus to generate pulse width modulated...

Details Method of and apparatus to generate pulse width modulated... Method of and apparatus to generate pulse width modulated...

2007-06-13

2010-12-07

Mis, David (Department: 2817)

Modulators

Pulse or interrupted continuous wave modulator

Pulse width modulator

C375S238000

Reexamination Certificate

active

07847651

ABSTRACT:
A method and apparatus to generate a pulse width modulated signal from a sampled digital signal by chaotic modulation. The method includes generating predetermined chaotic intervals having random interval values using a chaotic interval generator, and generating the pulse width modulated signal from a reference signal and the sampled digital signal during each of the chaotic intervals. Thus, electromagnetic interference (EMI) that affects an audio amplifier can be remarkably reduced.

REFERENCES:
patent: 6473457 (2002-10-01), Pascual et al.
patent: 6600669 (2003-07-01), Trzynadlowski et al.
patent: 2004/0192234 (2004-09-01), Glenn, Sr. et al.

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