Floating power switch

Details Floating power switch Floating power switch

1978-09-21

1980-11-25

Miller, Jr., Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307255, 307311, 307315, H03K 1700

Patent

active

042360897

ABSTRACT:
A floating transistorized switching circuit comprises an optical coupler for electrically isolating a source of control signals from the switching circuit; a floating DC voltage supply, electrically isolated from the AC power line, for providing positive and negative logic level operating voltages, referenced to whatever voltage appears at the output terminal of the switching circuit; an output stage including first and second NPN switching transistors connected in a Darlington configuration; and a logic network responsive to the output signal from the optical coupler going on for turning on the Darlington output stage, and to this output signal going off for turning off the Darlington output stage.

REFERENCES:
patent: 2767365 (1956-10-01), Guggi
patent: 3766409 (1973-10-01), Shuey
patent: 4021683 (1977-05-01), Splatt
patent: 4027228 (1977-05-01), Collins

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