Filter capacitor

Filter capacitor

Filter capacitors are any capacitors used for filtering. Filter capacitors are common in electrical and electronic work, and cover a number of applications, such as:

• Glitch removal on dc power rails
• Radio frequency interference (RFI) removal for signal or power lines entering or leaving equipment
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Filter capacitor

Filter capacitors are any capacitors used for filtering. Filter capacitors are common in electrical and electronic work, and cover a number of applications, such as:

Glitch removal on dc power rails
Radio frequency interference (RFI) removal for signal or power lines entering or leaving equipment
Capacitors used after the reservoir capacitor to further smooth dc power supplies
capacitors used in audio, IF or RF frequency filters (eg low pass, high pass, notch, etc)
arc suppression

Filter capacitor RF work

Plate Ceramic Capacitor are usually favoured due to extremely low inductance and low cost. Where precision is needed, silver mica capacitors offer superior precision and stability. Where manual tunability is required, plastic film trimmers are sometimes used, though it has long been more popular to adjust the inductor to achieve tuning.