EDN

Design Sallen-Key low-pass filters with G above 1, achieve lower output noise

It is common to see higher-order, multistage, Sallen-Key filters designed with each stage at a gain of 1. This has component-sensitivity advantages, but always produces significant noise gain peaking ...
Electronic Design

Learn The Limitations Of Low-Pass Sallen-Key Filters (.PDF)

Imperfect Amplifiers, Parasitic Capacitance, And Component Selection All Impact Filter Performance At High Frequencies. Since professors R.P. Sallen and E.L. Key described it in 1955, the Sallen-Key ...
EDN

Signal Chain Basics #126: How to design active filters with different response types using circuit-transfer function equations

Editor’s note: I am proud to bring you this article authored by both Collin Wells, Applications Manager, General Purpose amplifier products, Texas Instruments and Gustaf Falk Olson, Field Applications ...
Electronic Design

Simple Circuit Turns PWM Into A Digitally Adjustable Precision Reference

voltage. Often a passive single-pole RC filter will satisfy design requirements, but this approach typically suffers from several drawbacks including slow response time, noisy results, and having an ...