Op Amps: NIC (Negative Impedance Converter) and the Chua Oscillator

RE: Op Amps: NIC (Negative Impedance Converter) and the Chua Oscillator

shabaz — Wed, 08 May 2019 23:54:30 GMT

By coincidence today another article on negative resistance here:

https://hackaday.com/2019/05/08/fun-with-negative-resistance-jellybean-transistors/

RE: Op Amps: NIC (Negative Impedance Converter) and the Chua Oscillator

jw0752 — Sun, 05 May 2019 03:27:49 GMT

Hi Jon,

I enjoyed your very interesting experiment and blog. I read a couple books a while back on chaos theory. It was interesting to see that one can produce a chaotic system electronically. While I can seldom follow all the information provided in your blogs I love to be exposed to information above my current understanding level as it challenges me and peaks my interest.

John

RE: Op Amps: NIC (Negative Impedance Converter) and the Chua Oscillator

shabaz — Sun, 05 May 2019 02:43:39 GMT

Hi Jon,

Interesting circuit, and very unusual behaviour!

I'd never heard of it before, I'm wondering if the Chua diode is related or can be made from the Tunnel diode?

I've never made an oscillator using a tunnel diode, but I hope one day you get a chance to do it in your series on oscillators : )

Russian tunnel diodes are reasonably low-cost on ebay.. intriguing devices if you get a chance to experiment with them.

I once tried using it to make a trigger/latch circuit just as a science experiment, it's super interesting. Once set to the threshold (using a 10-turn trimmer) I could trigger it with a spark gap basically. Perhaps the simplest radio remote control.. I reckon it should be a classroom experiment, but maybe teachers have other ways (e.g. AM radio) to demonstrate spark gaps.