Synchronous rectifier control device and a forward synchronous rectifier circuit
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United States of America Patent
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May 31, 2011
Grant Date -
Jul 2, 2009
app pub date -
Jun 3, 2008
filing date -
Dec 31, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A synchronous rectifier control device comprises a status detecting unit, an analog circuit, a first counter, a second counter and a signal process unit. The status detecting unit receives at least one reference signal and a detecting signal to generate a first synchronous control signal. The analog circuit generates a delay signal in accordance with the first synchronous control signal. The first counter receives a clock signal and generates a first counter signal in accordance with the first synchronous control signal, the clock signal, and the delay signal. The second counter receives the clock signal and generates a second counter signal in accordance with the first synchronous control signal, the clock signal, and the first counter signal. The signal process unit generates a second synchronous control signal in accordance with the first synchronous control signal and the second signal.
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