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:
Jun. 07, 2022
Filed:
Jul. 17, 2020
Applicant:
Yamaha Corporation, Hamamatsu, JP;
Inventor:
Masao Noro, Hamamatsu, JP;
Assignee:
Yamaha Corporation, Hamamatsu, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R 3/12 (2006.01); G08B 3/10 (2006.01); H03F 3/183 (2006.01); H04R 1/40 (2006.01); H04R 3/04 (2006.01); H04R 27/00 (2006.01);
U.S. Cl.
CPC ...
H04R 3/12 (2013.01); G08B 3/10 (2013.01); H03F 3/183 (2013.01); H04R 1/403 (2013.01); H04R 3/04 (2013.01); H04R 27/00 (2013.01); H03F 2200/03 (2013.01);
Abstract
A speaker controller includes a switch that is inserted on a speaker wiring for supplying a sound signal to a speaker. A switch control circuit can extract and hold an ON/OFF control signal for instructing ON/OFF of the switch from an alternating-current signal supplied via the speaker wiring. A switch control circuit controls ON/OFF of the switch based on the ON/OFF control signal. A power supply circuit can generate a power supply voltage for operating the switch control circuit from the alternating-current signal supplied via the speaker wiring.