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:
Sep. 29, 2015
Filed:
Jun. 10, 2012
David C. Breece, Iii, Sunnyvale, CA (US);
Cara S. Yang, Mountain View, CA (US);
Nathan Johanningsmeier, San Jose, CA (US);
Kavitha Srinivasan, San Jose, CA (US);
David C. Breece, III, Sunnyvale, CA (US);
Cara S. Yang, Mountain View, CA (US);
Nathan Johanningsmeier, San Jose, CA (US);
Kavitha Srinivasan, San Jose, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
Circuits, methods, and apparatus for grounding contacts in an audio jack. One example may provide a driver, such as a charge pump, driving a first depletion mode transistor coupled between a first contact in an audio jack and ground, and a second depletion mode transistor coupled between a second contact in the audio jack and ground. The first depletion mode transistor and second depletion mode transistor may be p-channel transistors or n-channel transistors.