Is Negative Resistance Possible? - The Negative Impedance Converter and Negistors
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- čas přidán 1. 07. 2024
- Negative resistance is something that we usually think is just a cool idea. But you can actually use it in real life!
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Thanks for sharing your demonstration. With true negative capacitors, as voltage across the cap rises, the cap 'sources' more and more current rather than sinking it. We can have "Relative" negative resistance which you demonstrated, as well as "Absolute" negative resistance. Also there exists Negative permittivity and Negative permeability, a concept commonly utilized in "Metamaterials" engineering. By tuning a positive inductance with a negative capacitance huge bandwidth increases from short antennas are possible as the reactances track each other frequency wise.
Very interesting, thank you!
This seems like a neglected topic. Thanks for covering this with another great video. I will start using the word negistor.
The videos are getting better and better! If I may suggest something:
Think about making more videos with poor’s man/radical diy circuits (and calculations)! Just an eg. Building a PWM driver using a crystal and a decade counter
Stuff like that is awesome to learn how stuff works (just like your AM Radio video)
Another thing I almost never see is circuits and explanations on discrete op amps as feedback error amplifiers for whatever type of regulation necessary, that is something that people usually don’t think about it and only care about the feedback pins on off the shelf ICs
Those diy circuits are definitely some of the more interesting projects. There's a lot more planning when you can't just rely on one IC to do it all for you :)
Always love the vids
Thanks for watching the vids :)
Cool bro
Interesting video.
Will you do fallowup for USB HID tutorial? How to send data to PC using hardware HID of Atmega16u4?
Thank you :)
I'm sure I could do a video about a gadget doing just that. I do have a V-USB HID video in the meantime if you are interested :)
Nice work on the audio :D
Thanks for sticking through the first one!
trying to understand your op-amp circuit better, when you mean cancel resistance, If I have my battery on Vcc and Vee and I also have R1 and R2 in series to ground like that, are you saying that R1 and R2 will essentially appear as a short circuit to ground if R1 and R2 are balanced loads?
Obvously you still need to supply the amps so it's not free energy, but am i getting that right, like, the load resistances are litterally cancelled and it acts like a dead short?
I feel stupid just asking because you made a great video, I am struggling to get this concept. I watched the segment going on 5 times already, I'm really not getting it.
Yes, you can add the resistors in series just like you would normally. For example, 1k + -1k = 0 ohms.
The why you don’t have more subscribers baffles me
Uhh yeah, any "negative" resistance is a voltage source..
What is this practical for? All I can think of is as part of a radio.
You can also use it to 'cancel' out loads.
Negative resistance converters use in audio eqalaizers, active filters, regenerative receivers. Very interesting - connect directly antenna to freqency depended negative resistance converter ( band pass filter - amplifier ).
NIC cancels antenna resistance and antenna "transmitts" out negative resistance "field" - reduce loses in ground, trees, walls... and create "black hole" for radiowaves.
1kom + (-1kom) = 0 ohms ( epic short circuit with epic KA range short circuit currents... :D and circuit board explode /black humor/.