Electricity: power supply or regulation systems – In shunt with source or load – Using choke and switch across source
Reexamination Certificate
2006-12-12
2006-12-12
Han, Jessica (Department: 2838)
Electricity: power supply or regulation systems
In shunt with source or load
Using choke and switch across source
C323S285000, C323S301000
Reexamination Certificate
active
07148664
ABSTRACT:
A circuit for providing power factor correction includes a boost converter circuit with a boost inductance and a power factor correction switch and a control circuit. The control circuit provides a pulse width modulated signal to control the on time of a PFC switch, and also includes a power factor correction pulse width modulated device receiving as inputs a rectified AC input voltage, a DC bus voltage, a signal proportional to the current through the inductor and a reference current signal. The power factor correction pulse width modulated device also includes a pulse width modulated generator operable to provide the pulse width modulated signal to control the on time of the PFC circuit and a pulse width modulated blanking device operable to provide an enable/disable signal to disable the pulse width modulated generator when predetermined conditions are met.
REFERENCES:
patent: 5349284 (1994-09-01), Whittle
patent: 5359276 (1994-10-01), Mammano
patent: 6580253 (2003-06-01), Kanakubo et al.
patent: 6657417 (2003-12-01), Hwang
patent: 6781352 (2004-08-01), Athari et al.
Li Yong
Takahashi Toshio
Han Jessica
International Rectifier Corporation
Ostrolenk Faber Gerb & Soffen, LLP
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