Method and apparatus for a high voltage power supply circuit

Details Method and apparatus for a high voltage power supply circuit Method and apparatus for a high voltage power supply circuit

2011-05-03

2011-05-03

Han, Jessica (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C323S271000

Reexamination Certificate

active

07936159

ABSTRACT:
A control circuit for use in a power supply is disclosed. An example control circuit according to aspects of the present invention includes a signal generator coupled to generate an output signal to control switching of a power switch to be coupled to the control circuit. A feedback circuit is coupled to receive a feedback signal, which is representative of an output of the power supply during a feedback portion of an off time of the power switch. The signal generator generates the output signal in response to the feedback circuit to control a fraction of the feedback portion of the off time of the power switch that the feedback signal is above a threshold and another fraction of the feedback portion of the off time of the power switch that the feedback signal is below the threshold.

REFERENCES:
patent: 6922345 (2005-07-01), Nishida et al.
patent: 7463497 (2008-12-01), Negrete
patent: 7595624 (2009-09-01), Tateishi et al.
patent: 2009/0033393 (2009-02-01), Park et al.
patent: 2003-169469 (2003-06-01), None
patent: 2003-244953 (2003-08-01), None
patent: 10-2008-0039774 (2008-05-01), None

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