DEVICE FOR TRANSMITTING AUDIO SIGNALS AND ELECTRONIC SIGNATURE TOKEN
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United States of America Patent
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Issued Date -
Jul 30, 2015
app pub date -
Jun 13, 2013
filing date -
Jul 26, 2012
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Abstract
A device for transmitting audio signals includes an audio interface, a data transmission interface being a USB interface or a DOCK interface, and an amplifying module coupled with the audio interface and the data transmission interface respectively. The audio interface includes a first pin and a second pin. The first pin is a single-channel audio output pin or one of multichannel audio output pins, and the second pin is a ground pin. An electronic signature token including the device for transmitting audio signals is also provided.
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