Multi-channel digital pulse width modulator (DPWM)

Details Multi-channel digital pulse width modulator (DPWM) Multi-channel digital pulse width modulator (DPWM)

2011-03-29

2011-03-29

Mis, David (Department: 2817)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Rectangular or pulse waveform width control

C327S176000, C332S109000, C363S021100, C370S212000, C375S238000

Reexamination Certificate

active

07915938

ABSTRACT:
A multiple channel Digital Pulse Width Modulator (DPWM) can include a single delay locked loop with a delay line, the delay line producing a number of outputs. Circuitry can use a delay line mask to mask a portion of the delay line outputs to produce a modified outputs so as to prevent premature pulse width reset. Jitter tolerance look ahead circuits can prevent jitter from causing premature reset of pulse width modulated signals. The pulse width modulators can include multiple alternately used multiplexers so that the operation of the pulse width modulators is not affected by the load time of the multiplexers.

REFERENCES:
patent: 7528640 (2009-05-01), Huang et al.
patent: 2004/0207466 (2004-10-01), Anderson et al.
patent: 2006/0214712 (2006-09-01), O'Malley et al.
patent: 2007/0176815 (2007-08-01), Kost
patent: 2008/0012647 (2008-01-01), Risbo et al.
U.S. International Searching Authority, International Search Report and Written Opinion for International Appln. No. PCT/US2009/062702, Feb. 26, 2010, 11 pages.

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