Common Mode ChokesFilters and EMI (electromagnetic interference) optimization components are used in electronic circuits to prevent or reduce the amount of EMI that is generated by the circuit, or that is picked up from external sources. They are commonly used in applications where EMI can cause interference with other electronic systems, or where sensitive electronic components are being used. Common mode chokes are a type of filter that are used to suppress common mode noise in electronic circuits. Common mode noise is a type of noise that is present on both the positive and negative conductors of a circuit, and is typically caused by external sources such as power lines and motors. Common mode chokes work by creating a magnetic field that opposes the common mode current, effectively canceling out the noise. They are commonly used in applications such as data and power transmission, and in systems that are sensitive to EMI.