concept
Regarding differential signals, simply put, two lines transmit signals at the same time, with equal amplitude and opposite polarity.
advantage
1. Strong anti-interference ability. General noise interference is applied to the differential signal. Since the noise of the two lines is basically the same, the difference remains unchanged and will not affect the logic signal.
2. It can effectively suppress electromagnetic interference (EMI). The two wires are close to each other and have opposite polarities. The electromagnetic fields cancel each other out and cause little electromagnetic interference to the surroundings.
Wiring requirements
1. Equal length. The purpose of equal length is to ensure that the polarity of the signal is opposite at the terminal and to reduce the common mode component.
