What is Common Mode Chokes
What is the difference between a common mode choke and transformer? A common-mode choke is a sort of hybrid where the inductance is used to suppress common-mode signals, but the transformer action allow normal-mode signals to readily pass. The difference is basically in usage. A choke uses the inductance as a primary characteristic to affect a signal. In a transformer the inductance is secondary and is just to establish the magnetizing current with the transformer’s primary purpose being to transform one signal level (or impedance) to another.
CAN Common Mode Choke?