I thought it would make for an interesting subject to look back at the hands free revolution.
Now, there’s much more to making a practical filter than just getting a transfer function that calculates out nicely.
Newly-discovered physical principles are often the driving cause for the invention of new kinds of devices such as the transistor. It is one of the highlights in the history of electronics, and illustrates how device models develop in engineering and why they are often a key to technological advancement.
Every now and then something new comes along that causes you to want to dig down and find out a little more information. Tearing my attention away from Caitlin Jenner for a moment, I thought I'd take a closer look at the remarkable Solar Impulse 2 – an airplane powered solely by solar energy.
Some time back, I had to dig out some ancient filter design tools. I needed a special-purpose digital decimation filter for a “quite high quality” audio communication system.