PLL_AM

Published:2009/7/16 2:28:00 Author:Jessie | From:SeekIC

Phase-locked loop of Signetics NE561B is locked to AM signal carrier frequency, and output of VCO in IC is used as local oscillator signal for product detector. Tuned RF stage will generally be required, along with good antenna and ground. Simple one-transistor audio amplifier will suffice for driving loud-speaker. Circuit can be adapted for other frequencies outside of broadcast band, from 1 Hz to 15 MHz, by changing values of CY and C1.-E.Kanter, PLL IC Applications for Hams, 73 Magazine, Sept. 1973, p 47-49.



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