HEADSET SOCKET CIRCUIT

摘要

Disclosed is a headset socket circuit, comprising a first pin (1), a second pin (6), a left sound channel audio output pin (5), a right sound channel audio output pin (2), and four switching elements; the second pin (6) is connected to an MIC via a first switching element (71) and is grounded via a second switching element (72); the first pin (1) is connected to the MIC via a third switching element (73) and is grounded via a fourth switching element (74); a pull-up resistor (8) is connected to the left sound channel audio output pin (5) or the right sound channel audio output pin (2), with high power level at the connection; a signal detection terminal is connected to the left sound channel audio output pin (5) or the right sound channel audio output pin (2) connected with the pull-up resistor, and is configured to detect power level variation at the connection. With the present invention, a headset socket circuit achieves headset compatibility.