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 ...

My previous column described the Sallen-Key circuit for a low-pass filter. At times, you will not find a low-pass filter with the specifications you need in an anti-alias circuit, so you might decide ...

In the previous quiz, plots of the the Sallen-Key low pass active filter were shown with a few different values of R2 to show how they determine the response of the filter. This quiz asks about an ...