ULTRASONIC_CONTROL_RECEIVER

Published:2009/7/22 1:54:00 Author:Jessie | From:SeekIC

Five-stage amplifier Q1-5 amplifies both control signals, 38.285 kc and 41.805 kc, while Q6 and Q7 operate as class B detector-amplifiers to eliminate need for separate diode detectors. Desired control frequency energizes only one coil of double-fulcrum motor control relay. while noise acts on both coils and keeps relay balanced.-Transistor Amplifier Controls Remote Appliances, Electronics, 34:21, p 59.



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