MORE Active RC Filters

[@joejane9977]

i believe the device word type you are looking for is a gyrator IMSAI 1781 Gyrator (part 1 of 4) youtube video title was a great over view on this item as well thank you for covering it as well as everyone learns a different way and more knowledge is better then less

[@vikenemesh]

To add to this: -L made from a C is what Gyrators do: You can make some impressive simulated inductances for audio-filters out of capacitors: Larger caps are less heavy and expensive than the respective inductances you would need for audio frequencies at high power. Fesz basically explains this at the end of the video without mentioning gyrators and the cost/mass tradeoffs.

[@joejane9977]

@@vikenemesh yea i was adding reference materials the video i referenced has a multi page PDF and a 4part video series all about gyrators but yea you are one of a few i know that even knows what they are. as some point he was looking for a word to describe the circuit with a name/label early in the video. i really should have used the term "talk about frequency dependent negative resistance (FDNR) circuits" if you groogle these terms and look for the paper it shows LC RC LR type circuits the terms of the search should be :: "" elliott sound products active filters using gyrators " copy all in here and its the top link i still believe both are great content and excellent presenters

[@joejane9977]

@@vikenemesh alsso thank you for the ADD +++ ten K likes

[@petrusbosman4264]

Thank you very much 😊

[@_tiredofidiocy_]

Hmm, I didn’t even know that it's possible to build a low-pass filter with a constant phase using a negative impedance converter. And even bandpass filter 10:46 with constant phase in passband!? It looks like some kind of miracles, everything looked like it was impossible in principle. I now need to doublecheck this )

[@llamedom]

I am looking at the bibliography cited in the video for a reference to that circuit and I found nothing. Could anyone cite a reference to that kind of filters? I think they are very interesting.

[@joejane9977]

@@llamedom IMSAI 1781 Gyrator (part 1 of 4) youtube video title talk about frequency dependent negative resistance (FDNR) circuits WIKI on this GOOGLE this " elliott sound products active filters using gyrators "

[@thevicol]

Indeed, extremely interesting examples. I'm most intrigued by the ringing aspect - after all, we know that linear phase filters exhibit pre-ringing behavior as an impulse response. It would be worth to test this circuit a deeper with ltspice and then eventually build a prototype.

[@RensePosthumus]

As always very entertaing. I've learned a lot.

[@thecheapaudioengineer]

Hmmm so a zero degree phase shift high pass filter and low pass filter is possible

[@layt01]

Perfect, thanks.

[@user-vl5hu1mt8m]

Hi. Try to develop a driver for field mosfets so that it is better than IXDN609CI. Exactly. The power supply voltage of the driver is +22...25V. The driver load (mosfet gate capacity) is up to 3nf. And most importantly - the most even meander at frequencies up to 12 MHz.

[@R2AUK]

❤ 👍

[@BoxingDayAC]

12:30 The gyrator forces the simulated inductor in parallel but can't two gyrators be linked at their grounds with halved values to put it in series? I haven't seen an example circuit.

[@mr1enrollment]

cool

[@NotSure416]

Enter the LC filter.

[@BalticLab]

Great video, as always! Love all the LTSpice simulations for all the circuit. I recently gave you a shoutout during my live stream for that ( kzbin.info/www/bejne/nF6bo6OHg6yVack ) timestamp 1:41:37, I think you're the only person who does show simulations to that extend.

[@likemarksee]

Are you self employed? Your skills could help to speed up my project….on DIN rail mounted modules to filter noise. Noise comes from the mains supply (pump inverters) as well as switching power supplies. I have a rough design/plan, (proven), but I’m short on time to implement it along with everything else that I need to do for the project.