VLF_PREAMP_WITH_AGC

Published:2009/7/21 6:22:00 Author:Jessie | From:SeekIC

Fast-recovery computer diode acts as pure variable resistance shunting base of Q1 to ground, for full agc control without phase shift in output signal. In frequency range of 13 to 24 kc, phase shift is less than 0.25 microsec over 40-db input signal range.-J. D. Echols, Calibrating Frequency Standards with VLF Transmissions, Electronics, 35:17, p 60-63.



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