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:
Feb. 25, 2020
Filed:
Sep. 23, 2014
Dialog Semiconductor Inc., Campbell, CA (US);
Dialog Integrated Circuits (Tianjin) Limited, Tianjin, CN;
Fuqiang Shi, Los Gatos, CA (US);
Jianming Yao, Cupertino, CA (US);
Weihai Huang, Tianjin, CN;
Yong Li, San Jose, CA (US);
John William Kesterson, Seaside, CA (US);
DIALOG SEMICONDUCTOR INC., Campbell, CA (US);
DIALOG INTEGRATED CIRCUITS (TIANJIN) LIMITED, Tianjin, CN;
Abstract
A device for determining impedance at a data pin of a communication interface. In one embodiment, the device includes a current source configured to selectively inject a test current to the data pin. The device also includes a sensing circuit for sensing a first test voltage corresponding to a voltage at the data pin without the test current injected, and a second test voltage corresponding to another voltage at the data pin with the test current injected. The sensing circuit determines the impedance at the data pin based on the first test voltage and the second test voltage.