Method and an apparatus to adjust duty cycle for voltage...

Electricity: power supply or regulation systems – Input level responsive

Reexamination Certificate

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C323S271000, C323S283000

Reexamination Certificate

active

07405551

ABSTRACT:
A method and an apparatus to regulate voltage supply have been disclosed. In one embodiment, the apparatus includes a power converter block to generate an output voltage from an input voltage and a voltage regulator controller coupled to the power converter block to input at least one time-modulated signal to the power converter block, the at least one time-modulated signal having a duty cycle, the voltage regulator controller including a counter having an increment value substantially proportional to the input voltage, wherein the counter is used to adjust the duty cycle of the at least one time-modulated signal. Other embodiments have been claimed and described.

REFERENCES:
patent: 6954054 (2005-10-01), Brown
patent: 6977488 (2005-12-01), Nogawa et al.
patent: 7027944 (2006-04-01), Tabaian et al.
patent: 7123104 (2006-10-01), Bostak et al.
patent: 7215108 (2007-05-01), Inn et al.
patent: 7221130 (2007-05-01), Ribeiro et al.
patent: 7292016 (2007-11-01), Wake
patent: 2006/0145678 (2006-07-01), Ribeiro et al.

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