Introduction to LC Filters
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- Опубликовано: 2 июл 2024
- #223 In this video I continue looking at filters by analyzing implementations that utilize reactive only passive components - inductors and capacitors. I look at the main building blocks - the exact arrangements in which individual or groups of components are commonly used but also look at specific calculation tool that makes designing filters a bit more easy.
Filter series:
Ep1 - Intro : • Intro to Filters
Ep2 - Passive RC Filters: • Passive RC Filters
Ep3 - Active RC Filters: • Active RC-filter Basics
Ep4 - More Active RC Filters: • MORE Active RC Filters
Ep5 - Introduction to LC Filters: • Introduction to LC Fil...
Ep6 - LC filter limitations: • Limitations of LC Filters
LC calculator tool:
markimicrowave.com/technical-...
Component datasheets:
www.coilcraft.com/getmedia/71...
product.tdk.com/en/search/cap...
product.tdk.com/en/search/cap...
www.tdk-electronics.tdk.com/e...
www.tdk-electronics.tdk.com/d...
Further reading:
Handbook of Filter Synthesis; A.I. Zverev, 1967
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Honey wake up, FesZ dropped a new video
Real life components... but we will see it next time...
What a cliff hanger 😀
Excellent as always - the signal to noise ratio and format of presenting is outstanding 👍👍
Thank you. Good job.
Thanks for the Marki tool recommendation. It's just what us mathematically challenged folks needed.🙂
That's why I like simulation tools, its way easier than just doing the math's the old fashion way...
Redexpert from Würth Electronic is a similar tool.
Very nice. Thank you for more good stuff.
I am especially looking forward to the next in the series, about real life components with their parasitics.
👍Band-pass filters is another good topic, double-tuned circuit in particular. This circuit is often used in amateur radio receivers / transceivers. It combines LC filters and transformers.
Waiting for RF & antenna design, functioning and simulations on this channel
you are awesome!
In these filter series could you please cover EMI filter as well
Thank you for the video and the app recommendation. I'll give the Marki online app a try, though I really prefer downloadable apps. I don't like depending on the internet and the kindness of the online web page owner to always keep the free app available. I've seen more than 1such useful page pop up with a perpetual HTTP 404 error, or I want to do some dev work but I'm somewhere without a web connection.
As a ham radio builder and experimenter with only a high-school (12 year) education such PC applications allow me to nearly optimize my designs without spending hours playing with variable inductors and capacitors, then measuring the values off the devices to then replace with fixed values. I've become a real fan of device value selection apps, and circuit modeling programs.
I fully agree that a stand alone, local, piece of software is far more reliable in the long term, but at least for this series I will try to recommend the best tool - giving the best performance, that I can find, which is free. Anyway, there is no single correct answer when it comes to filters - you can reach the same outcome using multiple methods.
A good tool to run locally on a PC is RFSim99. This is a simple mainly passive components design and simulation tool which works in the S parameter domain. The output is either as a bode plot or Smith chart.
It has a few filter, impedance matching and attenuator design calculators which I find very useful. And you can run a tolerance sweep and see the effect of component variations. You can also import S-parameter files from a VNA, ie. to see the effect of a measured load or source impedance on a (filter) circuit.
It is an older tool but I use it a lot for designing my (ham radio) circuits.
Sir please make one video for EMI filter design and Spice simulation for an Dual active bridge converter with gate driver.
Greetings, great video. Just curious, is there music playing in the background of your opening monologue? If there is it's kind distracting on my audio system - if you've always had it I never noticed before. Thankfully it doesn't appear to be there in the rest of the video.
I was experimenting with adding in music as background in this and some of previous videos. I'll try to do some tweaks in the future
Inductors are hard to make and measure in nH range :|
Could you provide real examples to use such filters in?