CCS methods compare

[lineup]

Which CCS is to prefer?
There is an article which compares different ways to make a constant current source.
But I can't find this article.
I need help to find it.
Thank you!

 

[BesPav]

Hi, Lineup!

Try this one:
https://audioxpress.com/assets/upload/files/Sources_101_P1.pdf
https://audioxpress.com/assets/upload/files/Sources_101_P2.pdf

 

[jacques antoine]

See also here

 

[stv]

https://sound-au.com/ism.htm

 

[jxdking]

https://nathaliebeimler.com/tech/audio_amplifier_current_source_comparison.html
Among them, this is the best.

 

[lineup]

Hi, Lineup!

Try this one:
https://audioxpress.com/assets/upload/files/Sources_101_P1.pdf
https://audioxpress.com/assets/upload/files/Sources_101_P2.pdf

Thanks.
Those papers were the ones I was looking for.
Especially the first one.

 

[Mark Johnson]

I used the CCS from Walt Jung's Figure 7(a) [Sources_101_P1 article], in the Ship Of Theseus / VFET front end card named Hornet. I was pleased with how well it worked, in both polarities. See attachment.

_

 

[lineup]

Nice @Mark Johnson
Cascoding is evidently the way to do it.

 

[lineup]

Here is a simulation I did.
The two first use LT1004 reference diode. First is not cascoded. The second is cascoded.
The cascoded with LT1004 has the lowest impact from the signal at supply 1kHz.
TLV431 has also rather good result.

Two diodes 1N4148 has the poorest result.
One LED and the two transistors are not good either.

 

[jxdking]

You should fix 6.8K supply.