I want to design a filter circuit which is used to filter the CDI(Capacitive Discharge Ignition) Signal which comes from CDI unit in vehicle. Basically CDI unit is used in Ignition cicuit of vehicle. normally this is signal of 250V with very less energy and is very noisy.
I want to use CDI signal further with noise free in RPM circuit. so please help me to design a filter which remove noise from it.