Zenith Radio Corporation

Charles H Heuer

Johnny Collins

An integrated digital circuit for a wireless remote control system employs a first counter to distinguish the frequency of actuating signals and a confidence counter for establishing a minimum duration for an actuating signal. Logic circuitry responsive to an externally applied voltage level controls the operation of a three stage binary counter and a flip-flop to selectively initiate a first mode utilizing two frequencies for control of an eight step bi-directional volume function and a second mode in which the same two frequencies control a four state cyclic volume function and a bi-stable picture control.

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Glencoe, IL, United States of America

Charles H Heuer