In PCB copy boards, signal isolation technology is usually used in order to ensure that the components of the circuit board do not interfere with each other. Signal isolation technology allows analog or digital signals to be transmitted without the presence of barriers between the receiving end and the current connection across the transmission. This allows for a difference of up to thousands of volts between ground or reference levels outside the sending and receiving end, and prevents damage to the loop current between the different ground potentials of the signal.
It is mainly used in these situations:
In isolation technology, it is key for PCB designers to select different isolation devices according to the different types of isolated signals and the isolation requirements:
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