Detection circuit
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United States of America Patent
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Jul 24, 2007
Grant Date -
Apr 28, 2005
app pub date -
Jul 30, 2003
filing date -
Jan 28, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
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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