Gm Global Technolgoy Operations, Inc.

Larry D Lucas

Burtron D Schertz

Lester Wilkinson

William F Gilbert

Audio control circuitry for a four-channel system is disclosed which permits volume adjustment from a single master volume control potentiometer and balance adjustment from a single left-right balance potentiometer and a single front-rear balance control potentiometer.

Voltage translating circuit for volume and balance control of a

A circuit for generating a center tuned pulse for stopping the operation of a signal seeking FM receiver includes means for developing a bias current which is added to the output currents of the quadrature detector of the receiver. A stopping pulse is generated whenever the difference between the output currents is less than the bias current and a 10.7 mHz. signal is present in the IF amplifier.

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Kokomo, IN, United States of America

Larry D Lucas