Demystifying Digital Filters, Part 4
![](https://cycling74-web-uploads.s3.amazonaws.com/57ec430afd747b8a71b4f1ab/2021-03-26T21:44:27Z/image.png)
![](https://cycling74-web-uploads.s3.amazonaws.com/57ec430afd747b8a71b4f1ab/2021-03-26T21:48:12Z/image.png)
![](https://cycling74-web-uploads.s3.amazonaws.com/57ec430afd747b8a71b4f1ab/2021-03-26T21:45:36Z/image.png)
![](https://cycling74-web-uploads.s3.amazonaws.com/57ec430afd747b8a71b4f1ab/2021-03-26T21:48:58Z/image.png)
![](https://cycling74-web-uploads.s3.amazonaws.com/57ec430afd747b8a71b4f1ab/2021-03-26T21:50:08Z/image.png)
![](https://cycling74-web-uploads.s3.amazonaws.com/57ec430afd747b8a71b4f1ab/2021-03-26T21:51:05Z/image.png)
![](https://cycling74-web-uploads.s3.amazonaws.com/57ec430afd747b8a71b4f1ab/2021-03-26T21:52:00Z/image.png)
Lumped system
(Series split system. Image source: https://ccrma.stanford.edu/~jos/filters/Series_Case.html)
![](https://cycling74-web-uploads.s3.amazonaws.com/57ec430afd747b8a71b4f1ab/2021-03-26T21:53:31Z/image.png)
![](https://cycling74-web-uploads.s3.amazonaws.com/57ec430afd747b8a71b4f1ab/2021-03-26T21:54:52Z/image.png)
![](https://cycling74-web-uploads.s3.amazonaws.com/57ec430afd747b8a71b4f1ab/2021-03-26T21:56:26Z/image.png)
(Parallel split system. Image source: https://ccrma.stanford.edu/~jos/filters/Parallel_Case.html)
![](https://cycling74-web-uploads.s3.amazonaws.com/57ec430afd747b8a71b4f1ab/2021-03-26T21:58:22Z/image.png)
![](https://cycling74-web-uploads.s3.amazonaws.com/57ec430afd747b8a71b4f1ab/2021-03-26T21:59:24Z/image.png)
![](https://cycling74-web-uploads.s3.amazonaws.com/57ec430afd747b8a71b4f1ab/2021-03-26T22:01:18Z/image.png)
![](https://cycling74-web-uploads.s3.amazonaws.com/57ec430afd747b8a71b4f1ab/2021-03-26T22:02:02Z/image.png)
(Image source: Design IIR Filters Using Cascaded Biquads - Neil Robertson)
Click here to download the entire tutorial series as a single PDF