RC Filter Design Basics

An introduction to passive and active low pass filters, filter requirements and design concerns, and the evolution from a simple single-pole RC filter to a multi-stage Sallen-Key topology.

Description Reference
Single and dual pole passive RC filters Low Pass Filters, ElectronicsTutorials
Qualitative and quantitative Sallen-Key analysis Analysis of the Sallen-Key Architecture, Texas Instruments
Sallen-Key filter design and operation Sallen-Key 101 Whiteboard Series, Matt Duff, Analog Devices