Active filter
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An active filter is a type of analog electronic filter, distinguished by the use of one or more active component i.e. one which provides some form of power amplification. Typically this will be a vacuum tube, transistor or operational amplifier.
Active filter circuit configurations include:
- Sallen and Key, and VCVS filters
- State variable, and biquadratic filters
See Also
External links
- Split-Supply Analog Filter Expert (http://www-k.ext.ti.com/SRVS/Data/ti/KnowledgeBases/analog/document/faqs/spexpert.htm)
- Single-Supply Analog Filter Expert (http://www-k.ext.ti.com/SRVS/Data/ti/KnowledgeBases/analog/document/faqs/ssexpert.htm)
- Introduction to active filters (http://www.swarthmore.edu/NatSci/echeeve1/Ref/FilterBkgrnd/Filters.html)
- National Semiconductor's AN-779 (http://www.national.com/an/AN/AN-779.pdf) application note