Grounding circuit for alternate audio plug designs
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United States of America Patent
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Dec 26, 2017
Issued Date -
N/A
app pub date -
Mar 6, 2015
filing date -
Jun 10, 2012
priority date (Note) -
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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.
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