Active Filter(Sallen-Key Filters)

< 2차 저역 통과 필터 – 2nd Low pass filter> < 2차 고역 통과 필터 – 2nd High pass filter> * 참고: http://electronicdesign.com/ http://en.wikipedia.org/wiki/Sallen_Key_filter http://www.dei.unipd.it/~pel/