EDN

Zero offset active lowpass filter, part 1

This circuit is a two-pole, active lowpass filter. The DC path from input E1 to output Eo is via R1 alone and does not involve the op amp. Because C1 and C2 are DC blocks from the op amp to the signal ...
Geeky Gadgets

How to use the Excel FILTER function

Imagine you’re working on a massive Excel spreadsheet, trying to sift through rows upon rows of data to find specific information. You’ve tried VLOOKUP and XLOOKUP, but they just don’t cut it for what ...
EDN

Zero offset active lowpass filter, part 5

This sketch is for a zero offset, two pole lowpass filter that was described in part 1 of this series. It’s transfer function and algebraically-calculated roll-off results are nothing special. The ...