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:
Mar. 20, 2012
Filed:
Dec. 01, 2006
Pertti Saarinen, Salo, FI;
Pertti Saarinen, Salo, FI;
Nokia Corporation, Espoo, FI;
Abstract
The present invention pertains to a closed loop over-voltage protection for audio/video connection interfaces of devices especially of mobile devices. The over-voltage protection circuit for mobile devices comprising at least one connector with at least one electrical contact for connecting external devices and at least one internal contact to a circuitry using said connector, wherein said over-voltage protection circuit comprises: an electrically operated switch connected between an electrical contact of said connector and an internal contact to said circuitry, a control element to operate said electrically operated switch, wherein said control element is connected to said switch to operate said switch, a first voltage determining unit to detect a voltage between said contact of said connector and said electrically operated switch, and which is connected to said control element, and a second voltage determining unit to detect a voltage between said internal contact to said circuitry and said electrically operated switch, and which is connected to said control element wherein said control element is configured to open or close said switch based on the voltages detected at said internal contact to said circuitry and said contact of said connector.