Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Generating rectangular
Reexamination Certificate
2005-12-27
2005-12-27
Riley, Shawn (Department: 2838)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Generating rectangular
C375S346000
Reexamination Certificate
active
06980039
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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Dening David
Reed David E.
Scott Baker
RF Micro Devices, Inc.
Riley Shawn
Withrow & Terranova , PLLC
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