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ULTRASONIC_OSCILLATOR_KEYER

2014-11-07 11:24  
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ULTRASONIC_OSCILLATOR_KEYER
Generates keying pulses up to 2 sec wide at prf down to 0.1 pps. Oscillator cutoff bias is gated off during pulse operation and switched off during c-w operation. Pulse repetition generator V1 is relaxation oscillator with trigger period variable in 0.1-sec steps from 0.1 to 10.9 sec. Fast-recovery phantastron pulse generator 1/2 allows precise pulsing up to 90% duty cycle, with pulse lengths from 0.005 to 2 sec.-B. J. Cosman amd T. F.Hueter, Instrumentation for Ultrasonic Neurosurgery, Electronics, 32:20, p 53-57.