Avalanche_pulse_generator_for_rise_fall_measurements

Published:2009/7/24 7:27:00 Author:Jessie | From:SeekIC

This circuit draws only about 5 mA from the 1.5-V battery, and produces a 10-V pulse with a typical rise and fall time of about 350 ps. Q1 might require selection to get the desired avalanche behavior. A sample of 50 Motorola 2N2369s, spread over a 12-year date-code span，yielded 82％(with some in the 220- to 230-ps range). All good 2N2369s switched in less than 650 ps. C1 is selected for a 10-V amplitude output. The value spread is typically 2 to 4 pF. Ground-plane construction with high-speed layout techniques are essential for good results from this circuit. Linear Technology Corporations 1991, AN47-93.



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