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:
Dec. 26, 2017
Filed:
Mar. 06, 2015
Apple Inc., Cupertino, CA (US);
Roderick B. Hogan, San Francisco, CA (US);
Joseph C. Curcio, San Jose, CA (US);
David C. Breece, III, Sunnyvale, CA (US);
Cara S. Yang, Sunnyvale, 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 transistor or switch coupled between a first contact in an audio jack and ground, and a second transistor or switch coupled between a second contact in the audio jack and ground. The first transistor or switch and second transistor or switch may be p-channel transistors or n-channel transistors depletion or enhancement-mode transistors, floating-gate transistors, MEMs, relays, or other switching devices. The first and second transistors or switches may be on and conducting when power is removed from the driver.