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:
Sep. 12, 2023
Filed:
Mar. 18, 2022
Applicant:
Yamaha Corporation, Hamamatsu, JP;
Inventor:
Masao Noro, Hamamatsu, JP;
Assignee:
YAMAHA CORPORATION, Hamamatsu, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 7/08 (2006.01); H01F 7/02 (2006.01); H04R 9/02 (2006.01); H04R 9/04 (2006.01); H04R 1/04 (2006.01); H04R 9/08 (2006.01); H04R 3/00 (2006.01); H04R 7/12 (2006.01);
U.S. Cl.
CPC ...
H01F 7/081 (2013.01); H01F 7/02 (2013.01); H04R 1/04 (2013.01); H04R 3/00 (2013.01); H04R 7/127 (2013.01); H04R 9/025 (2013.01); H04R 9/046 (2013.01); H04R 9/08 (2013.01);
Abstract
A signal converter includes a magnetic circuit, a diaphragm, a first coil, a second coil, and a variable resistor. The magnetic circuit has a magnetic gap. The diaphragm is disposed over an opening of the magnetic circuit. The first coil is disposed in the magnetic gap and configured to output an electrical signal based on vibration of the diaphragm. The second coil is disposed in the magnetic gap and configured to brake the diaphragm. The variable resistor is connected to a first end and a second end of the second coil and configured to form a closed loop circuit together with the second coil.