The above circuit is a schematic for the avalanche transistor pulse generator. This is a sensitive and high-frequency circuit with LT1073 chip and 2N2369 transistor. This circuit makes use of the breakdown property of the transistor. Normal chips like 555 timer chip or logic gates cannot produce pulses with fast-rising time. Sep 11, 2014 · If you want a fast and high level impulse, then there are few ways to beat an avalanche pulse generator driving a step recovery diode and clipping line. At lower frequencies an RF transistor driving a resonate network and switched output clamp can generate a half-sine like in a Tektronix 1503 TDR.
simple pulse generator circuit using IC-555. This is a simple pulse generator circuit or standard astable oscillator circuit for IC 555 timer,NE555N IC.Like my own circuit, the HP 8753A's internal comb generator incorporates cascaded ECL line receivers at its input, although this 1980s-vintage instrument uses the older (and slower) MC10116. Next, a cascode preamplifier stage drives an emitter-follower PA based on three parallel 2N5109s, with the step-recovery diode in the emitter return path.
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