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A precision voltage-controlled time delay circuit

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1 Author(s)

A transistor circuit is described in which the time delay between a trigger pulse and the output pulse, is directly proportional to a control voltage over a 100 : 1 range. The delay circuit is synthesized from circuits performing the functions of ramp generation, voltage comparison and switching. The circuit uses matched dual planar transistors to achieve a temperature coefficient of 0.0025% per deg C, for temperatures between 20°C and 100°C.

Published in:

Radio and Electronic Engineer  (Volume:33 ,  Issue: 2 )