| 摘要 |
Provided is an audio signal transfer device. The device comprises: a first interface, a second interface, an audio signal amplification circuit and an impedance circuit. The first interface comprises an audio signal receiving pin, a microphone pin, and a ground pin. The second interface comprises an audio signal output pin. The audio signal amplification circuit is used for amplifying the audio signals received by the audio signal receiving pin and outputting same to the audio signal output pin. The audio signals received by the audio signal receiving pin flow to the microphone pin or flow to the ground pin through an impedance equivalent part of the audio signal amplification circuit. The impedance circuit is coupled between the microphone pin and the ground pin. The audio signal transfer device according to the present invention can detect whether the wire sequence of a microphone pin and a ground pin of an audio plug of the transfer device is the same as the wire sequence of a detection device. Also provided are an electronic signature tool, a detection device and an interface detection system of an audio signal transfer device. |
