Control circuit with frequency compensation

Details Control circuit with frequency compensation Control circuit with frequency compensation

2009-04-30

2011-11-22

Patel, Rajnikant (Department: 2838)

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

C323S282000

Reexamination Certificate

active

08064226

ABSTRACT:
The present invention discloses a control circuit with frequency compensation, which can be applied to an open-loop control system. The control circuit includes an oscillator which is additionally connected to a first comparator including a first input end, a second input end and a first output end. The first input end provides for inputting a sampling current, the second input end provides for inputting a total voltage of a reference voltage and a DC-level voltage, and the first output end outputs a down-conversion signal. When the sampling current is larger than the total voltage, the first comparator will generate the down-conversion signal to the oscillator to reduce a frequency of the oscillator, such that a current of the open-loop control system can be controlled effectively to prevent an electronic element form being burned down.

REFERENCES:
patent: 4214307 (1980-07-01), Peterson et al.
patent: 5177018 (1993-01-01), Inoue et al.
patent: 5579329 (1996-11-01), Taguchi
patent: 5600234 (1997-02-01), Hastings et al.
patent: 6246221 (2001-06-01), Xi
patent: 7301400 (2007-11-01), Dening
patent: 7468896 (2008-12-01), Gong et al.

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