Photocoupled isolated switching amplifier circuit
 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. 
General Electric Company
H Y H
H02M Y10S H02M
inventional additional inventional
James R.
Collins