After building several gyrator circuits lately, it's apparent some op-amp ICs fail miserably when used therein. After trying 4 different IC packages, only 1 performed perfectly. Some had noise near the zero cross-over, some would not reach the full range of gain -and some failed miserably. The gyrator parameters were not unreasonable. Wanted to pass this on so to head-off unnecessary troubleshooting.
@@ahnenpost5237 A genuine TI NE5532P worked the best. Other variations and counterfeit parts failed miserably. Also, if you use a cut/boost gain circuit, the two matching input resistors must be below 1k Ohm (I used 220 Ohm with great results); otherwise, it will break-down with oscillation when the gain is increased.
Minor correction at 15:28. The units have to "add up" to H, since the formula is the result of an analysis, and they do. Proof: 1 F * Ω^2 = 1 C/V * (V/A)^2 = 1 C * V / A^2 = 1 C * V / (A * C/s) = 1 V * s / A = 1 H.
Yes. I probably would've done it a little differently, but what you did was fine. I was trying to forestall people getting hung up on the ohms*ohms*farads part and instead focus on the bigger picture. In retrospect it probably would've been worth the time to make a little side note on that, maybe at the end. Thanks.
@@ElectronicswithProfessorFiore I tried to keep conversion short. Electrical units are complicated in a fun way once you get to SI units. I’m curious, though, how you would have done the conversion.
@@AlienLobster I tend to go back to basic definitions, but not all the way back to mks (e.g., defining current as charge per unit time). Your comment got me to thinking, and I don't want anyone to get the wrong impression from that offhand remark, so I have decided to make an addendum video to this one, explaining how the units work out. After thinking it over, I believe my initial idea of not jumping into that proof was proper as it probably would've derailed some people, but I also think it is worthwhile to explain it. A second video will allow those who want to understand this at a deeper level to see it, while those who just want the results can ignore the addendum video. It should be up within a week, assuming nothing comes up to gobble my time. I will also add a link to the addendum at the end of the video above.
Wanna use it as a speaker crossover? Only in a pre-amp to power amp situation. But then you need more power amps. and you get into Bi-Amps based on crossover frequency.
Yes, bi-amping (or tri-amping) is extremely useful in PA situations. I think it's a bit pricey for the average home listener, but a separate powered subwoofer can be a useful addition. Unfortunately, it has been my experience that the average user doesn't have a clue as to where to set the crossover frequency in a standard bi-amped PA system (and things are not much better for the sub, and even worse for a tri-amped PA). Hmm, maybe I sound do a video on that for the Science of Sound playlist...
Found you today and like your videos! Nice bruh up for me :) And also some new stuff which is great to learn. Just wondering, what is the software you are using? Anyway thanks for taking the time to make your videos! 👍
Very interesting. I just learned about Gyrators
After building several gyrator circuits lately, it's apparent some op-amp ICs fail miserably when used therein. After trying 4 different IC packages, only 1 performed perfectly. Some had noise near the zero cross-over, some would not reach the full range of gain -and some failed miserably. The gyrator parameters were not unreasonable. Wanted to pass this on so to head-off unnecessary troubleshooting.
missing the name of the OpAmp performing perferctly
@@ahnenpost5237 A genuine TI NE5532P worked the best. Other variations and counterfeit parts failed miserably. Also, if you use a cut/boost gain circuit, the two matching input resistors must be below 1k Ohm (I used 220 Ohm with great results); otherwise, it will break-down with oscillation when the gain is increased.
Minor correction at 15:28. The units have to "add up" to H, since the formula is the result of an analysis, and they do. Proof: 1 F * Ω^2 = 1 C/V * (V/A)^2 = 1 C * V / A^2 = 1 C * V / (A * C/s) = 1 V * s / A = 1 H.
Yes. I probably would've done it a little differently, but what you did was fine. I was trying to forestall people getting hung up on the ohms*ohms*farads part and instead focus on the bigger picture. In retrospect it probably would've been worth the time to make a little side note on that, maybe at the end. Thanks.
@@ElectronicswithProfessorFiore I tried to keep conversion short. Electrical units are complicated in a fun way once you get to SI units. I’m curious, though, how you would have done the conversion.
@@AlienLobster I tend to go back to basic definitions, but not all the way back to mks (e.g., defining current as charge per unit time). Your comment got me to thinking, and I don't want anyone to get the wrong impression from that offhand remark, so I have decided to make an addendum video to this one, explaining how the units work out. After thinking it over, I believe my initial idea of not jumping into that proof was proper as it probably would've derailed some people, but I also think it is worthwhile to explain it. A second video will allow those who want to understand this at a deeper level to see it, while those who just want the results can ignore the addendum video. It should be up within a week, assuming nothing comes up to gobble my time. I will also add a link to the addendum at the end of the video above.
@@ElectronicswithProfessorFiore Awesome! Thanks!
Wanna use it as a speaker crossover? Only in a pre-amp to power amp situation. But then you need more power amps. and you get into Bi-Amps based on crossover frequency.
Yes, bi-amping (or tri-amping) is extremely useful in PA situations. I think it's a bit pricey for the average home listener, but a separate powered subwoofer can be a useful addition. Unfortunately, it has been my experience that the average user doesn't have a clue as to where to set the crossover frequency in a standard bi-amped PA system (and things are not much better for the sub, and even worse for a tri-amped PA). Hmm, maybe I sound do a video on that for the Science of Sound playlist...
that gyrator craze
Fun making simulated reactive components using a few transistors and passives
SURELY you will use this as a foundation for a video on "Chau's circuit" !! 😉😉
Only if you have an attraction to chaos and stop calling me "Shirley"!
Found you today and like your videos! Nice bruh up for me :) And also some new stuff which is great to learn. Just wondering, what is the software you are using? Anyway thanks for taking the time to make your videos! 👍
TINA-TI, the free version of the TINA simulator, available from ti.com.
@@ElectronicswithProfessorFiore Thanks for that!