Capacitor Input Filter: Nothing more than a capacitor across the load resistor. This type of passive filter is the most common. Related posts: Work teams Bootstrapping Thyristor Common rail injection AC Load Line Primary filter or Surface filter Active Loading Bessel filter Diesel Particulate Filter (DPF) Active Filter Universal joint Capacitor Discharge Ignition (CDI) D-Jetronic Bypass filter Bridge Rectifier Halogen lamp Butterworth filter Chebyshev Filter Bypass Capacitor Active-load resistor Read more articles Previous PostBypass Capacitor Next PostCascaded Stages