I’m glad you found the video useful. I was experimenting a little with a longer design format, so I’ll consider making one about analogue delay lines. Thanks for the idea.
Excellent presemtation. A minor quibble with the power computation for the zener itself: I'd rather do that for the worst case scenario, where the zener is sinking all of the current. You'd probably pick the same component, but you'd recognize the headroom was a bit tighter.
I did wonder about that when I made the video but thinking that it was likely to be used in a fixed circuit I opted to add the extra headroom. Possibly I should have mentioned that - I’ll put a comment about that in the description area. Thanks for commenting.
The circuit works as it is - the output transistor gets its bias from the one connected directly to the Zener - thus us a standard Darlington configuration.
@@ElectronicsNotes What do you mean by ( breakdown ) ?.... Signal linearity breakdown ?!... Zener diodes don't breakdown linearity but their thermal coefficient is soooo bad that you can't dismiss its effect at all for all load variations ...
Excellent, can you please consider presenting a basic overview of analog delay lines, cheers.
I’m glad you found the video useful. I was experimenting a little with a longer design format, so I’ll consider making one about analogue delay lines. Thanks for the idea.
Nice picture of Stonehenge. Are you close to there? Interesting video. Thanks. Mike
Not sure where the Stonehenge image is????? I am about 85 miles away from it.
@@ElectronicsNotes on your wall above you
Ah yes - I hadn’t thought about that. It was a photo I took many years ago and one I like. I took it one evening as we were passing around sunset.
Excellent presemtation. A minor quibble with the power computation for the zener itself: I'd rather do that for the worst case scenario, where the zener is sinking all of the current. You'd probably pick the same component, but you'd recognize the headroom was a bit tighter.
I did wonder about that when I made the video but thinking that it was likely to be used in a fixed circuit I opted to add the extra headroom. Possibly I should have mentioned that - I’ll put a comment about that in the description area. Thanks for commenting.
would a shunt regulator also be required for the second transitor bias?
The circuit works as it is - the output transistor gets its bias from the one connected directly to the Zener - thus us a standard Darlington configuration.
@@ElectronicsNotes thanks. I guess the bias voltage toleraince of the output transistors explains it?
... and it is also used as a hell thermal noise generator ...
Any breakdown mechanism will be noisy - so yes that are good noise generators.
@@ElectronicsNotes What do you mean by ( breakdown ) ?.... Signal linearity breakdown ?!... Zener diodes don't breakdown linearity but their thermal coefficient is soooo bad that you can't dismiss its effect at all for all load variations ...
Small mistake at ~3:50 mark. The second line should have a unit of Amps and not mA, 0.0179 A.
Bother!!! I should have spotted it. I need to sort it out somehow.
I've managed to 'blur' the m in mA out where you spotted it and I'll alter it on the master in case I ever need to use that again.