Quasi-resonant valley voltage detecting method and apparatus

Details Quasi-resonant valley voltage detecting method and apparatus Quasi-resonant valley voltage detecting method and apparatus

2011-01-25

2011-01-25

Nguyen, Ha Tran T (Department: 2829)

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Transient or portion of cyclic

Reexamination Certificate

active

07876085

ABSTRACT:
The present invention discloses a quasi-resonant valley voltage detecting method, comprising the steps of: generating a valley detection signal by detecting a valley of a first quasi-resonant signal; generating a count value by counting the valley detection signal; and determining a level transition instance of a gating signal according to the count value, wherein the level transition instance of the gating signal is pulled back by the valley detection signal to trace the valley of the first quasi-resonant signal. The present invention also provides a quasi-resonant valley voltage detecting apparatus.

REFERENCES:
patent: 4928087 (1990-05-01), Kreft et al.
patent: 6548971 (2003-04-01), Gokturk

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