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High-pass filter
Butterworth filter
Wratten number. Wratten numbers are a labeling system for optical filters, usually for photographic use comprising a number sometimes followed by a letter. The number denotes the color of the filter and its spectral characteristics, and these numbers can be grouped into broad categories, but the numbering system is arbitrary within a group and ...
Multiplication table
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Low-pass filter
Band-pass filter
An example of high-pass active filter of the Sallen–Key topology. The operational amplifier is used as a buffer amplifier. An active filter is a type of analog circuit implementing an electronic filter using active components, typically an amplifier. Amplifiers included in a filter design can be used to improve the cost, performance and ...
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