Several manufacturers offer op amp-based filter design tools [1-3]. Some tools choose off-the-shelf capacitor values, but others select non-standard ones. The option to alter passive component ...

Editor’s note: This article is a follow-up to the 2011 article, ‘Design second- and third-order Sallen Key filters with one op amp’ on EDN. Author’s Note: The author is revising this article to ...

Sometimes, the pleasures of Android customization require that we put to use small, single purpose apps to get the job done right. One such app is called Screen Filter, who’s single purpose is to dim ...