Fun with third-order active filters

<img width="2083" height="2187" src="https://www.edn.com/wp-content/uploads/3rdOrderFilters_Figure2.jpg?fit=2083%2C2187" class="webfeedsFeaturedVisual wp-post-image" alt="" style="display: block; margin-bottom: 5px; clear:both;max-width: 100%;" link_thumbnail="" decoding="async" fetchpriority="high" srcset="https://www.edn.com/wp-content/uploads/3rdOrderFilters_Figure2.jpg?w=2083 2083w, https://www.edn.com/wp-content/uploads/3rdOrderFilters_Figure2.jpg?w=286 286w, https://www.edn.com/wp-content/uploads/3rdOrderFilters_Figure2.jpg?w=768 768w, https://www.edn.com/wp-content/uploads/3rdOrderFilters_Figure2.jpg?w=975 975w, https://www.edn.com/wp-content/uploads/3rdOrderFilters_Figure2.jpg?w=1463 1463w, https://www.edn.com/wp-content/uploads/3rdOrderFilters_Figure2.jpg?w=1951 1951w, https://www.edn.com/wp-content/uploads/3rdOrderFilters_Figure2.jpg?w=1900 1900w" sizes="(max-width: 2083px) 100vw, 2083px" /><p>Butterworth circuits come in both low- and high-pass versions, as well as ideal, Sallen-Key, emitter follower and DC accurate variants.</p> <p>The post <a href="https://www.edn.com/fun-with-third-order-active-filters/">Fun with third-order active filters</a> appeared first on <a href="https://www.edn.com">EDN</a>.</p>