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:
Aug. 28, 2018
Filed:
Apr. 20, 2016
Rohm Co., Ltd., Ukyo-Ku, Kyoto, JP;
Mitsuteru Sakai, Kyoto, JP;
ROHM CO., LTD., Kyoto, JP;
Abstract
A D/A converter converts digital audio data Dinto analog differential audio signals Vand V. A differential to single-ended conversion circuit converts the differential audio signals Vand Vinto a single-ended audio signal V. A volume circuit receives the single-ended audio signal V, and amplifies the single-ended audio signal Vwith a gain that corresponds to a volume value. A reference voltage source generates a reference voltage Vcommonly referred by the differential to single-ended conversion circuit and the volume circuit. In a calibration operation, a calibration circuit controls the D/A converter so as to shift at least one from among the differential audio signals Vand Vsuch that the difference between the output voltage Vof the differential to single-ended conversion circuit and the reference voltage Vapproaches zero.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile