| 摘要 |
<p>The utility model provides a transmission device for audio signals. The transmission device for audio signals comprises an audio interface, a data transmission interface and an amplifying module. The audio interface comprises a first pin and a second pin, wherein the first pin is one of a single-track audio output pin or a multi-track audio output pin, and the second pin is a ground pin; the data transmission interface is a USB (universal serial bus) or a DOCK interface; and the amplifying module is coupled with the audio interface and the data transmission interface. The transmission device can guarantee smoothness in audio signal transmission, power consumption is not increased, and cost is low. The utility model further provides an electronic signature tool.</p> |
