Electronics Manufacturing Services(EMS), also called Electronic Contract Manufacturing(ECM ).
EMS vendors mainly provide manufacturing and management services.
The minimum line width : Minimum width of copper trace.
Nowadays, with the development of process technology, minimum line width can be less than 2mil.
Linear transformer : The input and output voltage is fixed according to the turn ratio.
Ideal transformer: Ideal basic component.
The voltage of one port is proportional to the other port. In addition, there is no power loss.