Photocoupled isolated switching amplifier circuit

Details Photocoupled isolated switching amplifier circuit Photocoupled isolated switching amplifier circuit

1976-03-23

1977-05-31

Goldberg, Gerald

Electricity: power supply or regulation systems

Remote sensing

307311, G05F 164

Patent

active

040272281

ABSTRACT:
A switching transistor inverter circuit for driving high power AC loads such as arc discharge lamps from a DC electrical energy source. Each switching transistor is included in a switching amplifier whose response time is short as compared with the response characteristic of the load and the AC cycle period. A single driver circuit is coupled to the respective switching amplifiers by photocouple isolation means through an electrooptically coupled light emitter-sensor pair. A clock pulse generator provides the necessary signal to the driver circuit which includes a phase splitter driver. A two-stage amplifier receives the signal from the sensor transistor of the photocouple and amplifies it to drive the switching transistor which is, in the preferred embodiment, a power darlington device of the monolithic type.

REFERENCES:
patent: 3691403 (1972-09-01), Newmeyer
patent: 3881118 (1975-04-01), Forrest et al.
patent: 3890559 (1975-01-01), Kuster
patent: 3917962 (1975-11-01), Pascente
patent: 3958175 (1976-05-01), Braun
Electronics Nov. 23, 1970, vol. 43, No. 24, p. 68, "Optoelectronic Switch Monitors Line Power" by J. van Zee.

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