Schwegman Lundberg & Woessner, P.A.
Audio jack detection circuit
This document discusses, among other things, a detection system configured to identify a type of a pole of a four-pole audio jack using first and second comparators. The detection system can include a bias circuit configured to bias a detection input coupled to the pole, and first and second comparators configured to compare the detection input to respective first and second thresholds to provide an indication of the type of the pole.
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Yongliang Graham L S Shawn Seth M. Julie Lynn
Li Connolly Barden Prentice Stultz