Active lamp pulse driver circuit
A flashlamp drive circuit is described in detail. The device uses an unsaturated transistor as a current mode switch to periodically subject a partially ionized gaseous laser excitation flash-lamp to a stable, rectangular pulse of current from an incomplete discharge of an energy storage capacitor. A monostable multivibrator 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 amplifiers. A tap on an emitter resistor provides a feedback signal sensitive to the current amplitude to an inventory terminal of the amplifier, thereby controlling the pulse amplitude. The circuit drives the flashlamp to provide a square-wave current flashlamp discharge. NASA
- Research Organization:
- National Aeronautics and Space Administration, Greenbelt, MD (USA). Goddard Space Flight Center
- OSTI ID:
- 5223553
- Report Number(s):
- NASA-CASE-GSC-12566-1
- Country of Publication:
- United States
- Language:
- English
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