Pulse width regulator

Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...

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323289, 323290, H02P 1332

Patent

active

044058934

ABSTRACT:
A high voltage, pulse width regulator circuit wherein the input voltage may be up to twice the voltage rating of pass or switching transistors used in the circuit is disclosed. This is accomplished by dividing the input unregulated DC voltage or full wave rectified AC voltage in half. The divided voltage is placed on each of two input lines. The pulse width regulator utilizes two transistors or other semiconductor switches, each receiving one half the input voltage. To insure a properly regulated voltage on the output and to avoid the possibility of one of the transistors receiving more than one half the input voltage, means are provided for insuring that the voltage drop across either transistor will be limited to approximately one half the input voltage at all times. By utilizing the teachings of this invention, a pulse width regulator capable of handling an input voltage of at least twice the rating of the transistors employed in the regulator is obtained.

REFERENCES:
patent: 3530368 (1970-09-01), Gerard
patent: 4313155 (1982-01-01), Bock et al.
Proceedings of the 6th National Solid-State Power Conversion Conference, pp. B1-1 to B1-6, May 1979.

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