Abstract: The electronic tuning system includes a station selector, a memory, control circuitry, a display and a tuner having the reception band thereof divided into three segments. The tuner incorporates several resonant frequency circuits, each comprising a signal control varactor and a plurality of series connected inductors. Band switching circuitry is provided to simultaneously operatively delete selected inductors from each of the resonant circuits, in accordance with signals generated in a band segment selection circuit. Station selection signals are generated in accordance with the actuation of the signal selector and a display driver circuit is provided to generate a station frequency code to drive the display. The digital band segment selection circuitry generates band segment selection signals in accordance with the station frequency code.

Abstract: A circuit module, such as is used in a modular L-C filter, includes a support having a base portion and side portions. One or more electric circuit elements, such as inductors and capacitors, are mounted on the support. One of the side portions of the support is provided with an externally exposed recess which is adapted to at least partially receive an interconnecting element such as a coupling coil. Thus, two of the modules can be located on a circuit board in adjacent relationship with the recesses therein aligned to form a cavity in which the coupling coil is received, the coil itself preferably being independently mounted on the circuit board. In this manner, the amount of space required by the filter is substantially reduced.