Patent ID: 8054108

Claim:
An electronic signal transmission device, comprising: a main driving stage, having a main current source coupled to a reference potential and a main operation unit coupled to the main current source and a supply voltage, the main driving stage being adapted for receiving a first differential input data stream and outputting a differential output data stream; and a sub-driving stage, coupled to the main driving stage, and having two sub-current sources and a sub-operation unit, wherein one of the sub-current sources is coupled to the supply voltage, another one of the sub-current sources is coupled to the reference potential, and the sub-operation unit is coupled to the sub-current sources, and is adapted for receiving a second differential input data stream to output an emphasis signal, so as to reduce attenuation or distortion of the differential output data stream, and the sub-operation unit is further adapted for receiving a bias provided by the main driving stage, so as to stabilize a common-mode voltage level of the differential output data stream, wherein there is a delay of a specific bit length between the first and the second differential input data streams, wherein the main operation unit comprises: two main passive-resistors, having one ends coupled to the supply voltage without passing through any current source; and two main transistors, having gates receiving the first differential input data stream, drains respectively coupled to other ends of the main resistors for outputting the differential output data stream, and sources coupled to the reference potential through the main current source.