LOW RIPPLE DC TO DC POWER CONVERTER
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United States of America Patent
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Issued Date -
Jul 30, 2009
app pub date -
Jan 28, 2008
filing date -
Jan 28, 2008
priority date (Note) -
Abandoned
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Abstract
A low ripple DC to DC power converter comprises a first switch, a second switch, an inductor, a driving circuit, and an oscillating circuit. The driving circuit is used to control the first switch and the second switch based on a driving signal. The driving signal has a duty cycle. The oscillating circuit comprises a first oscillating signal and a second oscillating signal. The first oscillating signal has a first pulse width and the second oscillating signal has a second pulse width. The oscillating circuit is used to generate a pulse oscillating signal, where the frequency of the pulse oscillating signal is modulated based on the duty cycle, the first pulse width, and the second pulse width so as to reduce the ripple of the output voltage.
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