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. 17, 2020
Filed:
Jul. 22, 2017
Onkyo Corporation, Osaka, JP;
Naofumi Murai, Osaka, JP;
Onkyo Corporation, Osaka, JP;
Abstract
The present invention is intended to provide constant drive conditions of a relay switch. A relay drive circuit includes a current mirror circuit, a current suppression circuit, and a transistor Q. The current mirror circuit includes a transistor Q, a first resistor element R, a transistor Q, and a second resistor element R. A relay coilis provided on a current supply path extending from a collector terminal of the transistor Qto an earth conductor. The current suppression circuitincludes a capacitor Cas a current suppression element configured to suppress, after conduction between an emitter terminal and a collector terminal of the transistor Qhas been made, the current flowing through the current suppression element itself as compared to that in such conduction.