International Business Machines Corporation

Ronald S Jungling

Raymond Mathew Clemo

Nicholas Celenza

Elie M Najm

Brian David Miller

Carleton D Driscoll

A full reset flyback regulator includes a power transformer having a primary winding and at least one secondary winding coupled to a load. A single control winding on a primary side of the power transformer is coupled through control circuitry to a gate electrode of a switching device that is connected to the primary winding. The voltage polarity on the control winding alternates so that if the switching device is 'ON' a drive voltage is provided on its gate electrode and if the switching device is 'OFF' a bias voltage is provided to the error amplifier control circuit. Each cycle of the regulator is initiated via a sync pulse which is provided from the high voltage flyback transformer of a display or monitor subsystem.

Power supply circuit featuring minimum parts count

An apparatus which connects/disconnects battery from a load such as a computer system includes a first circuit arrangement which sets a first reference voltage level at which the energy source is connected through an FET device to the computer system, a second circuit arrangement that sets a second voltage level at which the energy source is disconnected by the FET device from the computer system and a third circuit arrangement which controls the FET device so that said FET device is forced into either its ON or OFF state once one of the reference voltages is reached. A second apparatus which reduces power dissipation in a battery charger power device by forcing the input voltage to track the battery voltage as the battery charges/discharges.

Growing community of inventors

Raleigh, NC, United States of America

Ronald S Jungling