GATE_DIP_FET_OSCILLATOR_

Published:2009/7/1 23:51:00 Author:May | From:SeekIC

Meter indicates gate current, which drops whenever resonant load is placed on tank circuit of oscillator by bringing plug-in input coil near frequency source being checked. By opening switch to power supply, circuit can be used as absorption wavemeter; when signal at resonant frequency of dip-meter tank circuit is picked up, gatesource circuit of FET operates as diode detector for producing increase in meter reading. Values of plug-in coil and tuning capacitor depend on frequency range of interest.-E. M. Noll, FET Principles, Experiments, and Projects, Howard W. Sams, Indianapolis, IN, 2nd Ed., 1975, p 213-214.



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