Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components
Reexamination Certificate
2005-06-28
2005-06-28
Nguyen, Matthew V. (Department: 2838)
Electric power conversion systems
Current conversion
With means to introduce or eliminate frequency components
Reexamination Certificate
active
06912139
ABSTRACT:
Cross-channel interference can be a problem in multi-channel switched power systems. A multi-channel switched power converter is provided a reference count generator that generates a reference count signal that is commonly distributed to multiple, pulse width modulating (PWM) channels of the converter. The common reference count signal counts through a sequence of successive timing values. Events in each channel are scheduled relative to the common reference count. Examples of such events include the amplification or de-application of a driving voltage pulse to an inductive means of the channel and the taking of voltage and current measurement samples. Cross channel interference is avoided or minimized by scheduling or re-scheduling events in each active channel so that they do not occur simultaneously in potentially-interfering channels, for example the taking of a current measurement sample in one channel and the turning on of an inductance-driving voltage pulse is a second channel.
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Kernahan Kent
Thomas John Carl
Fyre Storm, Inc.
MacPherson Kwok & Chen & Heid LLP
Nguyen Matthew V.
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