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Analog filter is typically used in electronics and is considered as a basic building block of signal processing. These analog filters are used to separate audio signals before applying to loudspeakers. To separate and to combine several telephone conversations onto a single channel can be done using analog filters. To select a particular radio station from the radio receiver by rejecting all other channels can be done using analog filters.
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Passive filters
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Active filters
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The circuits built using RC, RL, or RLC circuits.
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The circuits that employ one or more op-amps in the design an addition to resistors and capacitors
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Cheatography n. The art of mapping complex subjects into clear, instantly navigable reference guides.