SIDEBAND_SELECTOR_MOSFET

Published:2009/7/21 22:44:00 Author:Jessie | From:SeekIC

circuit uses diode switching of crystals in carrier oscillator to select either upper or lower sideband. Second transistor serves as common-source isolating amplifier for driving modulator. Switch applies +9V to anode of diode that closes feedback circuit for crystal to be activated. Developed for use in SSB transceiver; if operating in 9-MHz range, crystals can be 8.9985 MHz and 9.0015 MHz.-E. M. Noll, FET Principles, Experiments, and Projects, Howard W. Sams, Indianapolis, IN, 2nd Ed., 1975, p 191-192.



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