USB总线信号隔离的实现

An Implementation of USB Signal Isolation

由于USB的物理层过于简单,而数据的传输又是双向的,且没有任何直接的方法得到数据的传输方向,故无法把双向传输的D+/D-信号分离成单向的两路信号,所以USB的隔离实现非常困难。该文讨论了六种USB隔离的实现方法。

The USB physical layer is too simple,and data transmission is bidirectional,but there is no way to get the direction of transmission,so we are unable to separate the bidirectional signal on D+/D-into two channels of unidirectional signal.Because of this,the implementation of USB isolation is very difficult.This article discusses six solutions about USB isolation.