Well, it turns out that we can perform impedance scaling on actual components; let’s look at how we deploy key properties of the humble op-amp to do this.
Designing a filter using a spreadsheet. No sophisticated charts, no pole zero relationships, determination of a response type, none of those overly complex equations I learned in school.
We set out to eliminate the inductors in our LC lowpass filter – and ended up doubling the number of them! We’ll see shortly just how these can be made to disappear in one mathematical stroke
Using optimization to design circuits (some might call it organized guesswork – for some algorithms, that’s a pretty good description) isn’t a new insight.
Why did I want to set my source and load resistances to the same value?