Power supply circuit

Details Power supply circuit Power supply circuit

2009-04-23

2011-11-01

Sterrett, Jeffrey (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C323S284000

Reexamination Certificate

active

08049473

ABSTRACT:
A power supply circuit includes a pulse width modulation (PWM) signal generator, a current adjustment unit, a drive unit, and a feedback unit. The PWM signal generator outputs a PWM voltage signal to the drive unit. The drive unit outputs a first control signal to control the current adjustment unit to work, and outputs a first direct current signal and a direct voltage signal. The current adjustment unit outputs a second direct current signal. A working current of the electrical device comes from the first and second direct current signals. The feedback unit generates a feedback voltage signal according to the direct voltage signal, and transmits the feedback voltage signal to the PWM signal generator to adjust the PWM voltage signal.

REFERENCES:
patent: 7629778 (2009-12-01), Liu
patent: 7737672 (2010-06-01), Kudo
patent: 7884590 (2011-02-01), Liu
patent: 7898236 (2011-03-01), Houston et al.
patent: 2008/0012542 (2008-01-01), Liu et al.
patent: 2009/0153110 (2009-06-01), Huang
patent: 2010/0264889 (2010-10-01), Hu

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