Electronic tuning system with digital band selection

摘要: The electronic tuning system includes a station selector, memory, control circuitry, display and tuner having the reception band thereof divided into three segments. incorporates several resonant frequency circuits, each comprising signal varactor plurality of series connected inductors. Band switching circuitry is provided to simultaneously operatively delete selected inductors from in accordance with signals generated segment selection circuit. Station are actuation selector driver circuit generate code drive display. digital generates code. comprises line decoder, which converts decimal number; shift registers bistable circuits latch number being multiplexed; logic decodes provide means.