42667_MHz_MOSFET

Published:2009/7/2 7:26:00 Author:May | From:SeekIC

Unusual crystal-controlled oscillator, similar to modified Pierce oscillator that uses crystal between grids 1 and 2 of tetrode tube, can be used as local oscillator in VHF and UHF converters. No trimming ortuning is required to get overtone frequency. If fundamental of crystal is desired, increase RFC1 to 100 μH or replace it with 1K resistor. Stability is excellent. Circuit works well with supply as low as 4 V.-G. Tomassetti, Dual-Gate MOSFET Offers an Unusual Crystal-Controlled Oscillator Concept, QST, June 1976, p 39.



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