Circuits and methods for reducing interference from switched...

Details Circuits and methods for reducing interference from switched... Circuits and methods for reducing interference from switched...

2007-04-03

2007-04-03

Jeanglaude, Jean Bruner (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

C455S071000, C455S068000

Reexamination Certificate

active

11258668

ABSTRACT:
A method of generating a pulse width modulated data stream includes providing a first clock signal having a first frequency and selecting a divisor from a set of divisors for dividing the first frequency to select a pattern rate of a pulse width modulated data stream and thereby shift in frequency noise generated at the pattern rate during pulse width modulation. The first frequency of the first signal is divided to generate a second signal at the selected pattern rate. Noise shaping and requantizing is performed on the second signal to generate a noise shaped and requantized second signal and the pulse width modulated data stream having patterns at the selected pattern rate is generated in response to the first signal and the noise shaped and requantized second signal.

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