Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
July 24, 2007
Patent Application Number
10629863
Date Filed
July 30, 2003
Patent Primary Examiner
Patent abstract
A plug detection circuit. The detected circuit is disposed in an electronics device with an earphone jack, accepting plugs with a plurality of conductive rings. The detection circuit has a plurality of pins, wherein a first pin detects, and outputs a first logic potential, and a second pin detects the potentials at the conductive rings and outputs a second logic potential. The detection circuit determines the type of earphone connected to the earphone jack.
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