H - Electricity – 02 – M
Patent
H - Electricity
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M
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H02M 3/335 (2006.01) H02M 1/08 (2006.01) H03K 17/0812 (2006.01) H03K 17/60 (2006.01)
Patent
CA 1270298
Abstract A switching power supply that comprises a base drive transformer, a switch device connected to one end of the transformer's primary winding, and a transistor having its base connected to one end of the secondary winding and its emitter connected to the other end of the secondary winding, also com- prises a current-dependent voltage clamp connected across one winding of the transformer. The clamp circuit prevents the voltage across the primary winding from exceeding a predetermined value so long as the magnetizing current that flows in the primary winding when the switch device is opened does not exceed a predetermined value.
502760
Hoffman Gilbert A.
Kirby Eades Gale Baker
Tektronix Inc.
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