![](data:image/svg+xml;charset=utf-8,<svg height="215" width="430" xmlns="http://www.w3.org/2000/svg" version="1.1"/>)
The Sallen-Key low-pass filter is an active, positive feedback filter
References:
https://archive.org/details/donlancaster_sallen_key/mode/2up
Sallen-Key Filter
The Sallen-Key low-pass filter is an active, positive feedback filter
References:
https://archive.org/details/donlancaster_sallen_key/mode/2up