Circuit and method for reducing output noise of regulator

Details Circuit and method for reducing output noise of regulator Circuit and method for reducing output noise of regulator

2007-11-09

2010-11-16

Han, Jessica (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C323S288000, C323S901000, C363S049000

Reexamination Certificate

active

07834601

ABSTRACT:
A circuit and a method for reducing output noise when a pulse width modulation mode is started. A pulse width modulation circuit generates a first pulse signal having a duty cycle that is in accordance with an output voltage of a regulator circuit. A drive circuit generates the output voltage from an input voltage in response to the first pulse signal provided from the pulse width modulation circuit. A feed forward circuit controls the pulse width modulation circuit in a manner to generate the first pulse signal having a duty cycle that maintains the output voltage at a desired level before the pulse width modulation circuit provides the first pulse signal to the drive circuit.

REFERENCES:
patent: 6469478 (2002-10-01), Curtin
patent: 7215108 (2007-05-01), Inn et al.
patent: 7764053 (2010-07-01), Mehas et al.
patent: 2005130622 (2005-05-01), None
patent: 2005198484 (2005-07-01), None

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