Analysis of reflection of signal integrity

In high-speed circuit the character of the wires changed owing to the rising frequency of signal and the miniaturization of system. If the impedance of wires is discrete, the signal passing wires will reflect itself, which severely affects the signal integrity and potentially leads circuit to error state and leads to the circuit doesn't work even. From transmission lines theory this paper analyzes the inherent reason of causing the signal reflection phenomenon and proposes corresponding chart, analytical method to linearity terminal load and nonlinear terminal load. Based on the idea that the numerator of reflection factor is equal to zero, the paper analyzed methods such as termination resistance connected to ground, parallel connection termination and alternating termination, and then proposed termination method to eliminate the signal reflection, finally illuminated how to choose parameters. Considering the cost and the time of design, it is necessary to consider and fully eliminate the signal reflection in the circuit.