differential signal

In the transmission path, 1/2 of the signal to be sent and the inverted phase signal are sent at the same time, and the receiving side performs subtraction (difference) to restore the original signal. Noise generated from positive and opposite phases (negative) during signal transmission becomes opposite phase and cancels out each other.In addition, the noise on the transmission line is also canceled by the subtraction of the receiver, so it is excellent from the viewpoint of EMC. hold. On the other hand, there are also issues such as an increase in the number of lines due to having a positive electrode and a negative electrode, and sensitivity to the deviation of positive and negative timing (SKEW).