Differential Mode Filter and Common Mode Filter?

Differential Mode Filter and Common Mode Filter are both types of filters used to suppress interference signals in circuits.

Differential Mode Filters are primarily used to suppress differential-mode interference signals. Differential-mode interference refers to interference signals that act separately on the two signal lines in a circuit. By filtering and attenuating differential-mode interference signals, differential mode filters can effectively eliminate the impact of such interference on the normal operation of the circuit.

Common Mode Filters are mainly used to suppress common-mode interference signals. Common-mode interference refers to interference signals that act simultaneously on both signal lines in a circuit. By filtering and attenuating common-mode interference signals, common mode filters can effectively eliminate the impact of such interference on the normal operation of the circuit.

Both types of filters are typically constructed using components such as inductors, capacitors, and filter resistors. The design and selection of differential mode and common mode filters depend on specific application requirements and the frequency characteristics of the interference signals. For interference with different characteristics of differential-mode and common-mode signals, appropriate filter combinations or specialized differential-mode and common-mode filters can be used to accomplish the filtering task.