International Business Machines Corporation

Walter S Duspiva

John B Gillett

James H Spreen

In a regulated power supply, particularly a pulse-width-modulated supply, the on-off control is located in the feedback path between the supply output terminal and the pulse-width-modulator. Transformer coupled polling pulses sense both the state of the on-off control and the magnitude of the feedback error signal.

Regulated power supply with electrically isolated control and variable

A transformer has a multi-turn magnetic core about a loop of conductor. A bridge transformer has one turn of the core about one half of the conductor loop and a second turn of the core about the other half of the conductor loop, and an electrical center tap connection to the loop between the two halves thereof. Embedded diodes connect the ends of the loop to an external circuit.

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Port Ewen, NY, United States of America

Walter S Duspiva