Active lamp pulse driver circuit

Details Active lamp pulse driver circuit Active lamp pulse driver circuit

1981-06-24

1983-08-09

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Discharge device and/or rectifier in the supply circuit

Discharge control discharge device in the supply circuit

315224, 315225, 315237, 315241R, 372 25, H05B 4114

Patent

active

043981291

ABSTRACT:
A flashlamp drive circuit 10 using an unsaturated transistor Q1 as a current mode switch to periodically subject a partially ionized gaseous laser excitation flashlamp 20 to a stable, rectangular pulse of current from an incomplete discharge of an energy storage capacitor C1. A monostable multivibrator MV1 sets the pulse interval, initiating the pulse in response to a flash command by providing a reference voltage to a non-inverting terminal of a base drive amplifier AV1; a tap on an emitter resistor R2 provides a feedback signal sensitive to the current amplitude to an inverting terminal of amplifier AV1, thereby controlling the pulse amplitude. The circuit drives flashlamp 20 to provide a square-wave current flashlamp discharge.

REFERENCES:
patent: 3430159 (1969-02-01), Roeber
patent: 3551738 (1970-12-01), Young
patent: 3646395 (1972-02-01), De Pratti
patent: 3668548 (1972-06-01), Osial et al.
patent: 3806762 (1974-04-01), Punis et al.
patent: 3938060 (1976-02-01), Kato et al.
patent: 4005333 (1977-01-01), Nichols
patent: 4074208 (1978-02-01), Mack et al.
patent: 4168453 (1979-09-01), Gerhard et al.
patent: 4275335 (1981-06-01), Ishida

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