Zen -> Cen -> Sen, evolution of a minimalistic IV Converter

[RollE2k]

Although with salas shunt, it's recommended to shunt at least 70mA on top of load, and more seems better. So i would go for around 100mA with your SEN.

[EUVL]

If it should need 70mA extra to drive a 35mA load, then maybe you should consider using something else, like Walt Jung's shunt.


Patrick

[guglielmope]

For the moment I'm only making tests.
But I think that I'm not making an eco friendly I/V because a resistor I/V is better to save the energy of the planet.
For now the problem to solve is to obtain low noise and after I'll try other shunt configurations.
Thanks and I'll keep you informed.
Ciao
Guglielmo

[EUVL]

> a resistor I/V is better to save the energy of the planet

Then use batteries followed by a passive LC filter.


Patrick

[NicMac]

and

>For now the problem to solve is to obtain low noise

Then use batteries followed by a passive LC filter

[RollE2k]

Originally Posted by EUVL

If it should need 70mA extra to drive a 35mA load, then maybe you should consider using something else, like Walt Jung's shunt.

Of course you can shunt less, but as usual performance is better the more you shunt (as long as you can cool it).
But the minimum current of SSLV1.1 in original design is 100mA if i'm right, but you can always change some fets to lower it.
It's just as simple as performance vs power-usage/heat.

[NicMac]

> It's just as simple as performance vs power-usage/heat.

Even if this is the wrong thread I'm curios towards the validity of this postulated "simple" correlation between performance vs power usage.

1) Is it true for a constant current loads?
2) What is the correlation coefficient? You get 10% or 0.001% better performance by doubling the power usage?

curios minds want to know....maybe I should ask Salas

[samoloko]

when using sen Is not It better to have a lower Idss jfets In lower pair - ccs

[EUVL]

No.

[jan.didden]

Good morning Patrick from sunny Alicante - I say, you're an early riser on Sunday

jan