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. 15, 2026
Filed:
Jul. 25, 2024
Seiko Epson Corporation, Tokyo, JP;
SEIKO EPSON CORPORATION, , JP;
Abstract
A semiconductor device includes: a test signal generation circuit that, modulates a test signal to generate third and fourth modulated signals; an amplification circuit that, outputs a third amplified signal obtained by amplifying the third modulated signal to a first output terminal and outputs a fourth amplified signal obtained by amplifying the fourth modulated signal to a second output terminal; a peak frequency detection circuit that, measures a potential difference between the first and second output terminals to detect a peak frequency at which an impedance of a sound reproduction device reaches a peak; and a determination circuit that, determines whether or not the peak frequency is included in a reference frequency range determined based on a frequency band of the test signal and temperature information of the sound reproduction device.