Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Reexamination Certificate
2006-09-12
2009-02-17
Patel, Rajnikant B (Department: 2838)
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
C323S283000, C363S065000
Reexamination Certificate
active
07492136
ABSTRACT:
A multi-phase converter comprising a plurality of switching circuits each providing a switched voltage to an output node of the converter and wherein each switching circuit sequentially provides a switched output voltage to the output node at which an output voltage of the converter is developed; a clock circuit for providing a plurality of out of phase clock signals to the switching circuits to determine when each switching circuit provides the switched voltage to the output node; each switching circuit comprising first and second series connected switches connected across a DC voltage bus; further comprising a first circuit comparing a first signal proportional to a difference between the output voltage of the converter at the output node and a first reference voltage with a second signal comprising a ramp signal and for producing a pulse width modulated signal to control the on-times of the switches of the connected switching circuit; further comprising a second circuit comparing the first signal proportional to the difference between the output voltage and the first reference voltage to a second reference voltage and if the first signal exceeds the second reference voltage by a prescribed amount, for turning on at least one switching circuit to provide the switched output voltage to the output node prior to occurrence of the clock signal.
REFERENCES:
patent: 6696825 (2004-02-01), Harris et al.
patent: 7368898 (2008-05-01), Sutardja et al.
patent: 2006/0012352 (2006-01-01), Moussaoui et al.
International Rectifier Corporation
Ostrolenk Faber Gerb & Soffen, LLP
Patel Rajnikant B
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