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:
Jun. 13, 2017
Filed:
Mar. 20, 2014
Apple Inc., Cupertino, CA (US);
Sanjay Dabral, Cupertino, CA (US);
Xiaofeng Fan, Santa Clara, CA (US);
Geertjan Joordens, Sunnyvale, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
ESD protection circuitry is disclosed. In one embodiment, an integrated circuit includes first and second sensor circuits. The first sensor circuit has a first resistive-capacitive (RC) time constant, while the second sensor circuit has a second RC time constant. The RC time constant of the first sensor circuit is at least one order of magnitude greater than that of the second sensor circuit. A first clamp transistor is coupled to and configured to be activated by the first sensor circuit responsive to the latter detecting an ESD event. A second clamp transistor is coupled to and configured to be activated by the second sensor circuit responsive to the latter detecting the ESD event.