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:
Jul. 25, 2017
Filed:
Jan. 18, 2016
Silergy Semiconductor Technology (Hangzhou) Ltd, Hangzhou, ZheJiang Province, CN;
Hejinsheng Cao, Hangzhou, CN;
Silergy Semiconductor Technology (Hangzhou) LTD, Hangzhou, CN;
Abstract
A DC impedance detection circuit can include: an integration time generation circuit configured to generate an integration time signal in accordance with a current flowing through a speaker, where the current of a speaker at a beginning time of each active time interval of the integration time signal is the same as that at an ending time of the active time interval; a current integration circuit configured to integrate the current of the speaker in the active time interval, and to generate a current integration signal; a voltage integration circuit configured to integrate a voltage of the speaker in the active time interval, and to generate a voltage integration signal; and where a ratio between the voltage integration signal and the current integration signal is configured as a DC impedance of the speaker in the active time interval.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile