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The Sallen-Key filter is a simple electronic filter topology used to implement second-order active filters. It uses a unity gain amplifier with positive feedback provided by a capacitor to allow the filter to achieve quality factors greater than 1/2, which is limited in a standard second-order passive RC filter. The Sallen-Key filter was described by R.P. Sallen and E.L. Key in 1955 and uses their namesake. It provides signal buffering at low frequencies, grounding of the signal at high frequencies, and Q e

Author

RaviKiran

Language

EN