Clarification on noise (ideal case): the only noise generator is effectively the resistor, however, the RC filter band-limits the signal. Thus, in the Johnson noise equation, plugging in cut-off frequencies, working out the maths.. we arrive that the output noise is v=sqrt(kT/C) (independent of R, independent of bandwidth). However, for a fixed/given cut-off frequency, we would like to decrease R (as stated in the video), as this will in turn increase C and thus decrease the noise. I'd suggest checking this out with a simple noise simulation in LTSpice. I should have explained this better in the video.
Have you seen EEVBlog's videos on Jellybean components? What do you think about them? Dave has not made any video on Jellybean SMPS yet. It would be great if you make this video instead :) We can always check out the Art of Electronics of course.
I had an idea to build an esc with a ST Microelectronics STSPIN32F0 with GaN mosfets to shrink the footprint and power use of a BLDC motor controller. Do you think this is feasible for a small power efficient alternative?
@@優さん-n7m I saw that video quite some time ago, will need to rewatch it - but from what I can remember it's very useful. That would be a good idea for a video though (or something along the lines of 'my go-to SMD parts') - thanks for the suggestion!
@@TheAMFT I hadn't heard of the STSPIN* before - thank you for sharing, that looks very cool. I'm definitely going to look into that - will have to experiment a bit myself :)
The amount of information on this channel is just so great and unmatched,, I'm really happy that I purchased one of your courses, not only for the great amount of info and details, but also I want you to keep doing this kind of videos on UA-cam. Thanks Phil 🙏
@@PhilsLab Have you made a video that covers the topic of data converters, more specifically choosing an ADC and creating the circuit to interface source to it i.e buffer amplifier and anti-aliasing filter; and choosing a DAC and creating the circuit to interface with its output i.e analogue reconstruction filter or low pass filter; and finally, the method to do PCB layout with these things?
I really do hope you realize just how insanely valuable your information and page is. This is what the internet was made for, and I’m just beyond grateful I get to experience this sharing of knowledge in real time. Please keep the videos coming Phil, you’re the reason I’m pushing through electrical engineering
What an incredible and complete lesson related to RC filters. I'm eager to see videos like this, where it's supposed to know all that stuff but it helps a lot to those who are leain the beginning.
I used to calculate the component values, but then fine tune on the prototype stage. Other stages never seem to have the impedance I've calculated due to tolerances. Reminds me of when i had to calculate worse case max an min circuit operation to show that with the components tolerances the circuit board will always be within specification in production. Bloody hard work when you were doing it with a calculator 😢😢
Looking forward to a similar analysis on high-pass and/or band-pass tank circuits and variations. I understand it theoretically, but not from this kind of tinkering pov.
dear sir please how to get quasi sine wave (inductive crankshaft signal for automobile -12V to 12V ) from square wave i.e crankshaft signal (hall effect) varing from 0 to +5 VOLT using for exemple a low pass filter note: the frequency range is : 500 HZ TO 30KHZ THANKS SIR
Recently I had related problems with a flyback topology power supply. There were only electrolytic capacitors in its output filter and comething caused stochaicly occuring sinusoidal high amplitude RF noise (40-100MHz depending on the powered device) on the output (like +-8V). I think it was some LC ringing but didn't trace it back to the exact source. The solution I had was to disassemble the power supply and add 100pF + 100nF capacitors wit appropriate impedance characteristics to the output filter and the noise is instantly down to about 130kHz and +-2V at worst. So knowing this I'm adding some serious RF filtering to the final version of that device.
That's interesting, thanks for sharing! I'm actually currently working on a design which incorporates an isolated flyback topology converter. Will see how that pans out!
The total output noise is only dependant on the capacitance. Bandwidth is 1/(2piRC) and both Rs cancel out. So increasing R would not really increase the noise.
That's true that the Rs cancel out and it's only dependent on C, for the LPF case. However, for a given/fixed cut-off frequency, if we increase R we need to decrease C, which thus increases the voltage noise. Therefore, it makes sense to choose a smaller R to give a larger C, in turn giving lower noise. You're right that it's an 'indirect' cause though and I should have explained it better.
@@PhilsLab I am confused about something. Do we use PCB tracks to connect power or use copper pour planes? If we use planes, we still end up using vias anyway to connect to the IC on the top or bottom layer and where do we put the decoupling capacitors? Have you made a video on these things so far?
Hi Phil, I would like to buy your course(s) , however I use Fusion360 to design PCB's as a brand new embedded hardware engineer. Would the course be useful? or would you advice otherwise because you are using Kicad. Best regards, Jeffrey
Hi Jeffrey, both courses will be helpful regardless of what software you use. However, the mixed-signal course is definitely quite tailored towards KiCad. The advanced hardware course is far more tool-agnostic.
Clarification on noise (ideal case): the only noise generator is effectively the resistor, however, the RC filter band-limits the signal. Thus, in the Johnson noise equation, plugging in cut-off frequencies, working out the maths.. we arrive that the output noise is v=sqrt(kT/C) (independent of R, independent of bandwidth). However, for a fixed/given cut-off frequency, we would like to decrease R (as stated in the video), as this will in turn increase C and thus decrease the noise. I'd suggest checking this out with a simple noise simulation in LTSpice. I should have explained this better in the video.
Have you seen EEVBlog's videos on Jellybean components? What do you think about them?
Dave has not made any video on Jellybean SMPS yet. It would be great if you make this video instead :)
We can always check out the Art of Electronics of course.
I had an idea to build an esc with a ST Microelectronics STSPIN32F0 with GaN mosfets to shrink the footprint and power use of a BLDC motor controller. Do you think this is feasible for a small power efficient alternative?
@@優さん-n7m I saw that video quite some time ago, will need to rewatch it - but from what I can remember it's very useful. That would be a good idea for a video though (or something along the lines of 'my go-to SMD parts') - thanks for the suggestion!
@@TheAMFT I hadn't heard of the STSPIN* before - thank you for sharing, that looks very cool. I'm definitely going to look into that - will have to experiment a bit myself :)
@@PhilsLab
The Art of Electronics can always be used for guidance, the last edition was in 2015 and its part 2 (extra stuff) was issued in 2020.
I really like this kind of videos where someone explains "basic" or some more advanced electronics stuff in such a good way
Thank you!
The amount of information on this channel is just so great and unmatched,, I'm really happy that I purchased one of your courses, not only for the great amount of info and details, but also I want you to keep doing this kind of videos on UA-cam. Thanks Phil 🙏
Thank you, Mohammad - and thank you for your support, I hope you like the course!
There are so many content on this channel. I am proud to be a patreon 😀
Thank you very much for your support, Szymon!
@@PhilsLab
Have you made a video that covers the topic of data converters, more specifically choosing an ADC and creating the circuit to interface source to it i.e buffer amplifier and anti-aliasing filter; and choosing a DAC and creating the circuit to interface with its output i.e analogue reconstruction filter or low pass filter; and finally, the method to do PCB layout with these things?
Huge Thanks to all Patreons, Altium and PCB Way for supporting him..
I really do hope you realize just how insanely valuable your information and page is. This is what the internet was made for, and I’m just beyond grateful I get to experience this sharing of knowledge in real time. Please keep the videos coming Phil, you’re the reason I’m pushing through electrical engineering
Thank you very much for your kind comment - many more videos to come! :)
Wow, haven't even watched this video yet, but intro looks to be exactly what I've been asking for - thanks so much!
Thank you very much, Dan!
Great channel. Thanks for all your work, a ton of valuable info is made free and accessible
Thank you, Reid - you're very welcome!
What an incredible and complete lesson related to RC filters. I'm eager to see videos like this, where it's supposed to know all that stuff but it helps a lot to those who are leain the beginning.
Thank you, Alejandro - I'm glad to hear that!
This presentation was amazing! Keep it up!!!!!!!
Thank you very much for this amazing video really !!
That is great video as a lesson . This is great channel
Such a deep dive into theory, I moved back in time to my university lessons about circuit theory😀
What a masterclass! Congrats and kudos from Brazil!
Thank you very much!
Great video once again Phil!
Hope you are doing great. Cheers!!
Thank you very much - I hope all is well with you too!
No questions, so very good!
Thank you!
Very interesting video, Thanks again Philip
Thank you, Augustin!
I used to calculate the component values, but then fine tune on the prototype stage. Other stages never seem to have the impedance I've calculated due to tolerances.
Reminds me of when i had to calculate worse case max an min circuit operation to show that with the components tolerances the circuit board will always be within specification in production. Bloody hard work when you were doing it with a calculator 😢😢
Yet again a perfect video Phil!
Thank you very much, Jakub!
Great work. Very thorough 👍
Thank you!
Most sane German electrical engineer on UA-cam
Excellent . Can you compare results with your Real-Time Software Implementation of Analog Filters? That would be interesting.
Great idea!
Brilliant, thank you :)
Thanks a lot!
Next LC low pass filter .
Looking forward to a similar analysis on high-pass and/or band-pass tank circuits and variations. I understand it theoretically, but not from this kind of tinkering pov.
That's to come!
dear sir
please how to get quasi sine wave (inductive crankshaft signal for automobile -12V to 12V ) from square wave i.e crankshaft signal (hall effect) varing from 0 to +5 VOLT using for exemple a low pass filter
note: the frequency range is : 500 HZ TO 30KHZ
THANKS SIR
Recently I had related problems with a flyback topology power supply. There were only electrolytic capacitors in its output filter and comething caused stochaicly occuring sinusoidal high amplitude RF noise (40-100MHz depending on the powered device) on the output (like +-8V). I think it was some LC ringing but didn't trace it back to the exact source. The solution I had was to disassemble the power supply and add 100pF + 100nF capacitors wit appropriate impedance characteristics to the output filter and the noise is instantly down to about 130kHz and +-2V at worst. So knowing this I'm adding some serious RF filtering to the final version of that device.
That's interesting, thanks for sharing! I'm actually currently working on a design which incorporates an isolated flyback topology converter. Will see how that pans out!
Amazing video, can you make the same video for active filters, and also some tutorials about "La place transform" to be able to analyse circuits.
Thank you! Yes, definitely plan on covering those topics!
thanks
Another great video! Can I also use this for a ledstrip pwm dimmer that makes audible noise at 1khz?
The total output noise is only dependant on the capacitance. Bandwidth is 1/(2piRC) and both Rs cancel out. So increasing R would not really increase the noise.
That's true that the Rs cancel out and it's only dependent on C, for the LPF case. However, for a given/fixed cut-off frequency, if we increase R we need to decrease C, which thus increases the voltage noise. Therefore, it makes sense to choose a smaller R to give a larger C, in turn giving lower noise.
You're right that it's an 'indirect' cause though and I should have explained it better.
@@PhilsLab ooh ok! It wasn't clear that it was under the constraint of a given bandwidth. Thank you
Great stuff, thanks for the effort. What package do you use to do the circuit drawings in the slides? Tikz?
Thanks, Greg! I use draw.io with Latex typesetting - to me much quicker than Tikz for figures.
Can you do a video on how to properly route DDR4 and what the Layout differences compared to DDR3 are?
Yes, that'll be a part of the Zynq Ultrascale+ design.
Am i going crazy, or was there a crosstalk video posted and removed last week?
Yeah, there was but there was an error in it. I'm also gonna add in a real-world demo, then re-post.
@@PhilsLab brilliant, I was tackling that exact problem in work this week. Please keep up the fantastic work.
@@PhilsLab
I am confused about something. Do we use PCB tracks to connect power or use copper pour planes? If we use planes, we still end up using vias anyway to connect to the IC on the top or bottom layer and where do we put the decoupling capacitors? Have you made a video on these things so far?
Hi Phil, I would like to buy your course(s) , however I use Fusion360 to design PCB's as a brand new embedded hardware engineer. Would the course be useful? or would you advice otherwise because you are using Kicad. Best regards,
Jeffrey
Hi Jeffrey, both courses will be helpful regardless of what software you use. However, the mixed-signal course is definitely quite tailored towards KiCad. The advanced hardware course is far more tool-agnostic.
Why’s crosstalk video missing?
Please share slides...
👍🙏❤
Hi Phil, could you do the same video for common Mode filter
Thanks, Farouk - next will probably be ferrite beads.
@PhilsLab you are a great person I learned a lot from you and your courses
Thank you, I'm glad to hear that!
I am also waiting for the same. much informative 👌
Drone receiver 😢🙏🙏🙏🙏🙏😭😭😭😭🙏🙏🙏🙏🙏🙏🙏🙏