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. 20, 2025
Filed:
Mar. 30, 2023
Rohm Co., Ltd., Kyoto, JP;
Mitsuteru Sakai, Kyoto, JP;
ROHM CO., LTD., Kyoto, JP;
Abstract
An audio circuit is configured to allow an analog voltage to be input via its volume setting pin. A power supply pin receives a power supply voltage. A bias circuit generates a first reference voltage that corresponds to the analog voltage. A D/A converter converts a digital audio signal into an analog audio signal. AD/A converter has a variable voltage range with a full scale that can be changed according to the first reference voltage. A class D amplifier outputs an output pulse signal having a duty cycle that corresponds to the analog audio signal output from the D/A converter and having an amplitude that corresponds to the power supply voltage.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile