Patent ID: 8897379

Claim:
A digital communication system comprising: a host communicated with a client via an interface unit; the host comprising a processor, a first control unit, and a high frequency transformer comprising a primary winding and a secondary winding, wherein the primary winding comprises a first sub-winding and a second sub-winding; the first sub-winding comprises a first terminal and a third terminal; the second sub-winding comprises a second terminal and a fourth terminal; the first terminal and the second terminal connect to the interface unit; the third terminal and the fourth terminal connect to a direct current (DC) power; when the host communicates with the client, the processor outputs a first channel signal and a second channel signal to the first control unit, the first control unit and the high frequency transformer modulate the first channel signal and the second channel signal into a first digital signal, and the first digital signal is transmitted to the client via the interface unit.