Pulse width modulation signal generator and switching mode...

Details Pulse width modulation signal generator and switching mode... Pulse width modulation signal generator and switching mode...

2005-12-06

2005-12-06

Riley, Shawn (Department: 2838)

Electric power conversion systems

Current conversion

With starting arrangement

C363S056110

Reexamination Certificate

active

06972971

ABSTRACT:
A switching mode power supply includes a rectifier configured to convert AC power to a first DC power, an output unit configured to convert the first DC power to a second DC power under the control of a first switch, and a pulse width modulation generator coupled to control the first switch. The pulse width modulation generator has a regulator configured to regulate the first DC power. The regulated first DC power powers the pulse width modulation generator. The regulator includes a second switch coupled to control a transmitter so that when the second switch is in a first state the transmitter transmits the first DC power to a capacitor to charge the capacitor to thereby increase the regulated first DC power, and when the switch is in a second state the transmitter does not transmit the first DC power to the capacitor to thereby allow the charge in the capacitor to reduce and in turn the regulated first DC power to reduce.

REFERENCES:
patent: 5014178 (1991-05-01), Balakrishnan
patent: 5285369 (1994-02-01), Balakrishnan
patent: 5982640 (1999-11-01), Naveed et al.
patent: 5995384 (1999-11-01), Majid et al.
patent: 5999429 (1999-12-01), Brown

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