Patent ID: 8625683
Filing Date: 2014-01-07
Classification: H04L

Abstract:
1. A serial data transmission system, comprising: a transmitting terminal for transmitting a data, a receiving terminal for receiving the data transmitted by said transmitting terminal, a first connecting capacitor connected between said transmitting terminal and said receiving terminal, and a second connecting capacitor connected between said transmitting terminal and said receiving terminal, wherein said transmitting terminal comprises a transmitting terminal driver unit and an amplitude detection unit connected with said transmitting terminal driver unit, said transmitting terminal driver unit outputs a pair of differential signals, said amplitude detection unit detects an amplitude variation of the differential signals output by said transmitting terminal driver unit, and outputs an indication signal indicating whether said transmitting terminal and said receiving terminal are properly connected with each other, wherein said amplitude detection unit comprises an amplitude detection circuit, a reference voltage generation circuit, a reference voltage terminal connected with said reference voltage generation terminal, and a comparator respectively connected with said amplitude detection circuit and said reference voltage terminal, said amplitude detection circuit detects an amplitude variation of the differential signals output by said transmitting terminal driver circuit, and outputs a voltage which is proportional to the amplitude variation of the differential signals to said comparator, said comparator compares said voltage output by said amplitude detection circuit with a voltage at said reference terminal in size, and outputs the indication signal indicating whether said transmitting terminal and said receiving terminal are properly connected with each other, said receiving terminal comprises a first resistor and a second resistor connected in parallel.