Explore: Digital Filters

filter due to their increased complexity, but they make practical many designs that are impractical or impossible as analog filters. Digital filters can

Filters designed by this methodology are archaically called "wave filters". Some important filters designed by this method are: Constant k filter, the

may be needed to get a good result. The design of digital filters is a complex topic. Although filters are easily understood and calculated, the practical

Linear filters process time-varying input signals to produce output signals, subject to the constraint of linearity. In most cases these linear filters are

second-order filters; therefore, higher-order filters are typically implemented as serially-cascaded biquad sections (and a first-order filter if necessary)

frequency filters would act as low-pass wavelength filters, and vice versa. For this reason, it is a good practice to refer to wavelength filters as short-pass

There are many filter technologies other than lumped component electronics. These include digital filters, crystal filters, mechanical filters, surface acoustic

stage. Various filter topologies and network synthesis filters for higher orders exist, which ease design. Discrete-time high-pass filters can also be designed

original spectrum. Digital filters come in both infinite impulse response (IIR) and finite impulse response (FIR) types. Whereas FIR filters are always stable

shows technical advantages to both methods. Digital filters are more precise and flexible. Analog filters are simpler, can be more efficient and do not