Digital dead-time controller for pulse width modulators

Details Digital dead-time controller for pulse width modulators Digital dead-time controller for pulse width modulators

2005-08-14

2009-06-30

Luu, An T (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Rectangular or pulse waveform width control

C327S175000, C327S176000, C332S110000

Reexamination Certificate

active

07554372

ABSTRACT:
Dead-time gaps are inserted into one of two output transistor control signals from a digital pulse width modulator by controlling the leading and trailing edges using the same phase-division and dithering signals employed by the digital pulse width modulator. Adders add the phase select signals from the digital pulse width modulator and the dithering signal to the leading and trailing edge control signals, with the output employed by multiplexers as select controls in selecting a phase of from the phase-shifted versions of the system clock with which to clock latches controlling the leading and trailing edges.

REFERENCES:
patent: 6067334 (2000-05-01), Bostica et al.
patent: 7227476 (2007-06-01), Wong

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