DC-DC converter with reduced electromagnetic interference
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United States of America Patent
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Nov 29, 2005
Grant Date -
Sep 23, 2004
app pub date -
Mar 17, 2003
filing date -
Mar 17, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
A DC-DC converter includes a variable frequency oscillator, a control system and a power train. The DC-DC converter is well suited for use in a cell phone. The control system uses the output of the oscillator to control the power train. The oscillator varies its frequency as a function of a pseudo random number generator, thereby reducing electromagnetic interference caused by ripple in the output of the DC-DC converter.
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