RADIO_DIRECTION_FINDER_

Published:2009/7/10 4:46:00 Author:May | From:SeekIC

This RDF circuit consists of a square-wave oscillator (IC1), which switches two antennas alternately at an audio rate. A phase detector (Q1, 2, 3, 7) is used to compare receiver output amplified by IC2 with the reference phase from IC2 with the reference phase from IC1. A 50-μA meter is used as a left-right indicator. IC3 is a comparator used to drive indicator LEDs.



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