Channel selection apparatus

Details Channel selection apparatus Channel selection apparatus

H - Electricity

03

J

365/4

H03J 5/24 (2006.01) H03J 5/02 (2006.01)

Patent

CA 1108785

51/18 CHANNEL SECTION APPARATUS ABSTRACT OF THE DISCLOSURE A channel selection apparatus comprises a counter, a decoder a clock pulse generator and a control circuit for controlling them, and selects a channel by switching a channel selection voltage by selecting a potentiometer. the counter includes cascade-connected flip-flop such that a trailing edge of an AND output of an output of a flip- flop in one stage and a channel selection count input signal triggers a flip-flop in the following stage. The decoder includes a plurality of output transistors and a plurality of parallel-connected transistor sets with common collectors of each of the transistor sets being connected to a base of a corresponding output transistor and input-signals being applied to bases of each of the transistor sets.

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