Recent content by Physineer

Encryption. Pass a signal through a chaotic circuit and as long as the inverse chaotic behavior can by synthesized (like the key) the original signal can be recovered. Research has found chaotic circuits with inverses.

Hi yungman, thanks again. We're starting to whiddle it down. Your primary criteria seems to have come down to whether or not the structure is larger than 1/10λ. So let's drill down on that. If it's less, than reflections aren't a problem - why not? If it's more, than reflections are a...

I can do better. A single bipolar transistor common emitter amplifier...with a damaged junction. It displays mind-boggling complexity (chaos), if one tries to study the output as a function of the input.

All circuits that displays chaotic behavior, at least 2-D, are really beyond deterministic modeling. They can be numerically simulated, that is all.

Thanks again yungman! I asked about filtering, where the gain is typically less than one (even in the passband, due to insertion loss), specifically to avoid this consideration. I think it will help keep the explanation simpler. So, even when G<1, impedance matching is still important. Why (or...

Hi yungman, thanks for the reply. Rather than replying point by point, I think I'll highlight the one comment that, if followed through on, has the best chance of getting to the bottom of it: Can you summarize, as concisely as possible, why "impedance is everything" in RF in your view? This...

I've designed both types of filters for years and can't really explain the difference in clear simple terms. I'm hoping somebody here can help me out with that. First, some working terminology: RF filter - a filter with a controlled input and output impedance, usually 50 ohms, to match the...