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:
May. 31, 1977
Filed:
Nov. 12, 1975
Applicant:
Inventor:
Takehide Takemura, Hirakata, JA;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F / ;
U.S. Cl.
CPC ...
323 79 ; 3072 / ; 3072 / ; 323 17 ; 323 25 ; 325464 ; 334 15 ;
Abstract
Electronic switches are used for switching the fine-tuning variable resistors in the electronic tuners of television receivers or stereophonic systems, and consist of a number of thyristors with P- and N-gates connected in parallel. The cathodes of the thyristors are connected in commmon, while a switch is connected to the anode circuits of said thyristors. A detector having an input connected to the N-gate circuits of the thyristors and an output connected to said switching means; and a number of input terminals each connected to the P-gate of each thyristor are also provided.