AUTOMATIC TUNING CONTROL CIRCUITS

A system is described for automatically controlling the tuning of a television receiver employing a tuner which uses variable reactance devices to afford frequency selectivity. Since such variable reactance devices are voltage responsive, the system provides a plurality of control voltages to enable tuning over different frequency bands and to different channels within each band. A printed circuit switch including a plurality of contacts, fabricated as an integral assembly, are driven by a bidirectional motor to afford rapid tuning operation. The motor, in turn, is driven by a motor control circuit which is responsive to the motor position to determine when the motor accesses a preselected channel, to then stop the motor at that location. A series of indicator lamps coupled to the switches indicate the channel selected.