Power supply with pulse frequency modulating circuit...

Details Power supply with pulse frequency modulating circuit... Power supply with pulse frequency modulating circuit...

2007-04-19

2009-12-29

Behm, Harry (Department: 2838)

Electricity: power supply or regulation systems

In shunt with source or load

Using choke and switch across source

C323S283000, C323S284000

Reexamination Certificate

active

07638989

ABSTRACT:
A method for stabling a voltage, a pulse frequency modulating circuit and a power supply using the same are provided. The method includes the following steps. First, a comparing signal is provided. Then, set the comparing signal to be a first logic state when the voltage to be stabilized is lower than a preset voltage. Next provide a pulse signal when the comparing signal is set in the first logic state. Afterwards, adjust the enable time of the pulse signal based on the number of times of logic state changing of the comparing signal within a preset period and, adjust the voltage according to the enable time of the pulse signal.

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