Switching circuit of power converter having voltage-clipping...

Details Switching circuit of power converter having voltage-clipping... Switching circuit of power converter having voltage-clipping...

2006-04-19

2009-11-10

Tso, Edward (Department: 2858)

Electricity: power supply or regulation systems

Output level responsive

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

C323S270000, C323S271000

Reexamination Certificate

active

07615976

ABSTRACT:
A switching circuit for power converters is presented. It includes a voltage-clipping device, a resistive device, a first transistor and a second transistor. The voltage-clipping device is coupled to an input voltage. The first transistor is connected in series with the voltage-clipping device for switching the input voltage. The second transistor is coupled to control the first transistor and the voltage-clipping device in response to a control signal. The resistive device provides a bias voltage to turn on the voltage-clipping device and the first transistor when the second transistor is turned off. Once the second transistor is turned on, the first transistor is turned off and the voltage-clipping device is negatively biased. The voltage-clipping device is developed to clamp a maximum voltage for the first transistor.

REFERENCES:
patent: 7208924 (2007-04-01), Toyoshima et al.
patent: 2003/0178976 (2003-09-01), Xi
patent: 2003/0234636 (2003-12-01), Ruan et al.
patent: 2004/0113595 (2004-06-01), Sugiura
patent: 2005/0162140 (2005-07-01), Hirst
patent: 2006/0158164 (2006-07-01), Kojima et al.
patent: 1661812 (2005-08-01), None

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