Phase Lock Loops 101 with Bil Herd

[FrankenPC]

WOW this video has been illuminating! Now I look at microcontrollers which say "80 mhz PLL" and I know EXACTLY what it means! I had no idea before! Thanks!

[rptj19]

Excellent video !

[fingerboy18]

Always account for unused states! That's good design practice :)

[CampKohler]

Will it do any good to bug you about the diode video, or should we just regard you as a "component tease."

[jeriellsworth]

@CampKohler I can only do videos as I have time. The ones that pay the bills get top priority followed by contract work that pays the bills. :)

[josh2utube]

Great job, PLL's have always had a bit of unexplained magic... no more!

[AmazGraz]

I do well at this point to calculate the charge on a capacitor, or the RC constant. And if you have points 1 & 2, & these are through an RC network and points 3,4 for output (in an H configuration, I have trouble understanding why the output current is through 3,4. I don't see it happening. It just looks like the electricity goes between 1,2 to charge the capacitor and discharge . I mean, the simplest stuff sometimes throws me. But y'll awesome. & I gotta watch.

[chipos81]

This was excellent! Nice work, Bill. Definite yes to starters FPGA design idea.

[Frank55]

In my experience the design of a PLL loop filter is rather complicated. During my experiments the average frequency produced by the PLL was always right, but generally there was a lot of jitter on the signal. Especially when I used it in a synthesizer configuration to produce a VHF signal, with a 100 KHz. frequency as reference. When you listened on an SSB receiver, you could hear that the VHF frequency was constantly drifting around the desired frequency, so there was never a stable 'lock'.

[ChristopherCoulombus]

Another great video. A sequel demonstrating the pll in action would also be great. Tnx.

[farmdve]

Honestly, i like your voice. You are also very Beautiful!

[avgdvl]

Amazing video, bringing back some sweet memories of my unfinished education in electronics... both digital and analog... and my old C64 ...

I could watch you guys for hours and hours.



[CampKohler]

We were teased two months ago.

I'm still waiting on Pins & Needles (P-N).

[29riteshkakkar]

nice work................

[eddy66t6]

bill have a youtube channel himself?

[a120068020]

@eddy66t6 yes its BilHerd :)

[DKT1st]

Thanks Jeri & Bil, Didn't understand it all but learnt a lot. Many thanks look forward to some more.

[PatheticComputing]

Wow! This video contains so much information that's relevant to the stuff I'm doing. I'm working on my own DRAM controller right now for my game console but it has problems. All the DRAM stuff Bil was talking about gave me some ideas on how to fix it. My game console has a lot a bugs probably from many of the things that Bil talked about like setup and hold times. And, I've also "cheated" so many times by inverting the clock. Anyways, I love the video and I'd like to see more FPGA stuff!

[tmbg1985]

I don't understand it all but this video goes all the way to 11 ! We want more!!!!

[TheCrazyInventor]

Oh yes, I've been looking for a decent explanation about PLLs for ages. Never quite understood how they worked. Thank you both for the interesting video! :)

My eyes are all messed up now from trying to constantly focus on an unsharp image, though... Where can I send my donation for that webcam fund?

[bkraz333]

Yes, a video on getting started with FPGAs would be wonderful! I'd definitely vote for that idea.

[jp8rock]

make some brief tutorial on FPGA programming and interfacing with vga ,sdram,mouse,keyboard etc in deep.

thankyou..

[2M0JAS]

A very interesting and informative video.

Thanks

James

[a120068020]

I showed the video to my friend Carl G3XGK. He did a long distance PLL for the GPS freq standard. It locked a frequency 12,500 miles away! That used a 4046 like Bil was describing.

[AntiProtonBoy]

More of this stuff please. Very good!

[rgfcarson]

Awesome! Learnt a lot! :D

[jacgoudsmit]

"FPGA's are faster than snot" -- Bil Herd. LOL



[papalevies]

This is the longest video I have ever seen

[WisdomVendor]

where and when was this streamed live?  and when is the next similar live stream?

[jeriellsworth]

@WisdomVendor This was from my hack lab. I do these from time to time. You can find out about the next one if you follow me on twitter.

[WisdomVendor]

@jeriellsworth Thanks Jeri, will do  :)

[jimbobg65]

Yay! I was just researching PLLs and how to make one for my FM transmitter. Thank you for the video!

[KaslarProductions]

"Are you keeping up with the Commodore?" because the commodore is being rushed out the door using spare caps to force a passing test. =P

[engmustafa83]

let us see your nice right eye

remove your hair a bit

hhhhhhhhhhhhhh

thanks a lot for this nice video

it's great

[jeriellsworth]

@engmustafa83 My hair was misbehaving. Time to get it trimmed. :)

[a120068020]

@jeriellsworth I thought you styled your hair over your eye on purpose - shows what I know about fashion! Got a portable radio weekend this weekend on a kind farmer's field - it stops raining. Anyway, thanks Jeri and Bil for a great video!

[colt4547]

Thanks Jeri! I'm 21 too, we should hang out. Great vid, I'm looking forward to the FPGA series.

[Orthosonic]

Major epic awesomeness!!!

I am a happy subscriber.

[BlowDevilUp]

Wow Totally Excellent!

[KeeFCrook]

Wow a real blast from the past! Propagation delays, slew rates, race hazards... Thank god for strong tea, ( or coffee if from across the pond) and just how many cut their teeth on a 200 in ? I've still got mine, must dig it out sometime Lol. Another great post Jeri, thanks

[RobRichmondRPG]

We need to set up a fund to get Bil a decent quality webcam ;)

[Vlakpage]

@RobRichmondRPG decent webcam doesn't help in 360p

[DixieGeek]

Great Show! Thanks Jeri and Bil.

[thewii552]

haha...pll is also a cubing term...it means Permutatio of Last Layer

[culerz]

@thewii552 yup. im a speed cuber too. so at first i got confused with PLLs lol

[thewii552]

@culerz since I am in insane electronics geek, whenever i hear "pll" for cubing terms, chances now I will think they mean Phase Lock Loops...

[culerz]

@thewii552 well i was just a former speed cuber and now and electronics geek. lol

[thewii552]

@culerz i currently am a beginner cuber, but have been doing electronics for a couple years. I am not a speedcuber, but am farmilliar with all the terms.

[culerz]

@thewii552 oh man, we're just complete opposites!

[thewii552]

@culerz pretty much. :) but I play minecraft too. So not complete opposites