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. 08, 1979
Filed:
Aug. 08, 1977
Kaku Sakaida, Tokyo, JP;
Trio Kabushiki Kaisha, Tokyo, JP;
Abstract
A switch-off shock muting circuit for use in an AM receiver comprising a muting element disposed in a signal transmission path extending from the antenna through the demodulation and low frequency amplifying sections to the speaker of the receiver, a power switch and control switching means interlocked with the power switch, the control switching means being operated at an earlier time than the turning off of the power switch to thereby control the muting element, whereby spark noise caused by the power switch is prevented by controlling the muting element from the control switching means to thereby interrupt the signal transmission line earlier than the turning off of the power switch.