Audio/Speaker Data Line Protection Circuit Diagram

As shown in the figure is a protection circuit for audio / speaker data lines. In terms of audio data line protection , the signal rate of the audio channel is relatively low, and the requirements for capacitive devices are not too high (around 100 pF is acceptable). In fact, some mobile phone designs combine earphones and microphones, while others use separate lines. In the former case, a single-channel TVS can be selected, while in the latter case, if the two loops are adjacent, a multi-channel TVS array can be selected, so that only one device can be used to protect the two loops.