Active filter experiments

This is an introduction to electronic filters and part of DIY HAM radio Maker-Blog of HB9GZE witch you find here: https://hb9gze.ch

This series covers in diffrent videos:
1. Introduction to electronic filters:    • Introduction to electronic fiilters  
2. Designing an analog bandpassfilter :    • DIY transceiver: bandpass & lowpass f...  
3. Designing a crystal filter:    • DIY transceiver: Crystal ladder filter  
4. Do some experiments with active filters:    • Active filter experiments  
5. Setting up a digital IIR filter on a STM32F4:    • Digital filter experiments on STM32F4  

The documentation used in this video can be found on my blog at https://hb9gze.ch
There you also fin all the links to the tools I used.
Find the code of the digital filter here: https://github.com/HB9GZE/Pub_STM32_A...