The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 04, 1980
Filed:
May. 22, 1978
Masahiro Takeshita, Takatsuki, JP;
Kazumi Kawashima, Takatsuki, JP;
Minoru Ueda, Takatsuki, JP;
Keisuke Yamamoto, Ibaraki, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
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 a 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.