Voltage monitor and control circuit
AssigneeGTE Automatic Electric Laboratories Incorporated
InventorHomer F. Hutchinson
Life of this patent
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Abstract
A circuit for the monitoring and control of a DC to DC regulated power supply furnishing regulated voltage to a load. The output of the power converter is ultimately used to control a pair of shunting transistors which control the switching transistors in the power converter.
Claims7
A voltage monitoring control circuit connected to a DC to DC power converter utilizing switching transistors connected to a primary winding and a feedback winding of a transformer having a secondary winding whose output is rectified and forms the output of the power converter, wherein said voltage monitoring control circuit comprises:
- a differential amplifier;
- voltage reference means connected to one input of said differential amplifier;
- sensing means connected between said power converter output and said second input of said differential amplifier, said differential amplifier producing an output in response to voltage changes at said second input proportional in magnitude to said voltage changes;
- shunting control means connected to said switching transistors of said power counverter, said shunting means including a control transistor connected across each of said switching transistors, the main current path of said control transistors connected across the base emitter junction of said respective switching transistors;
- and
- translating means connected between said control leads of said junction control transistors and said output of said differential amplifier, said shunting control transistors controlling the base current of said switching transistors so as to regulate the output of said power converter.
Dependencies are inferred from the claim text.