Archive for date: December 12, 2009

An Active Filter Design

December 12, 2009 | Amateur Radio, electronics | By: Mark VandeWettering

Eldon, WA0UWH pointed out WA4DSY’s website that features an active filter design applet. I was just waking up this morning, so I thought I might give it a try. I used LTSpice’s universal op-amp node, and wired it for positive and negative voltage feeds. I specified a 2.2uH value for the caps, and a 800hz […]