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    • 7. 发明公开
    • EARPHONE PULLING AND PLUGGING DETECTION CIRCUIT
    • SCHALTUNG ZUR DETEKTION DES ANSCHLUSSES UND TRENNUNG EINESKOPFHÖRERS
    • EP2519034A1
    • 2012-10-31
    • EP11822991.3
    • 2011-01-31
    • ZTE Corporation
    • SUN, QinliSHE, HaiboZHANG, WengangLIU, FengpengLIANG, Mao
    • H04R29/00
    • H04R5/04H01R13/6616H01R13/7033H01R24/58H04R5/033H04R2420/05
    • Earphone plugging and unplugging detection circuits are disclosed in the present invention, wherein one of the circuits includes a left sound channel (L) pin, a first pin which can be connected and disconnected with the L pin, a right sound channel (R) pin, and a second pin which can be connected and disconnected with the R pin; the circuit also includes a left detection signal line which is connected with the first pin, the left detection signal line is connected or configured with a pull-up resistor, the first pin is electrically connected with the second pin, and the L pin and the R pin are connected with a pull-down resistor respectively. The present invention not only has the advantages of having simple circuit, small area occupied by PCB and low hardware cost, but also can effectively improve the reliability of the earphone plugging and unplugging detection.
    • 在本发明中公开了耳机插拔检测电路,其中一个电路包括左声道(L)引脚,可与L引脚连接和断开的第一引脚,右声道(R)引脚 以及可以与R引脚连接和断开的第二引脚; 电路还包括与第一引脚连接的左检测信号线,左检测信号线连接或配置有上拉电阻,第一引脚与第二引脚电连接,L引脚和 R引脚分别与下拉电阻连接。 本发明不仅具有电路简单,PCB占用面积小,硬件成本低等优点,而且可以有效提高耳机插拔和拔插检测的可靠性。