Current conveyor as a voltage amplifier

[dadod]

Originally Posted by bcarso

One more caveat that occurs: again, under fault conditions, the power DMOS parts can see out-of-spec magnitudes of gate-source voltages. Although zeners for protection are somewhat high capacitance, you could bias one "on" and use a small signal diode like a 1N4148 to be normally reverse-biased and only clamp a gate for a good-sized but in-spec overvoltage condition.

Have I got it correctly?

[bcarso]

Originally Posted by dadod

Have I got it correctly?

Yes, that's exactly what I'd recommend. It may be that the zeners (without the standby biases) alone are low-enough capacitance, but with the additional diodes you're even closer to adding negligible capacitance.

[dadod]

This is the shuntreg PCB, suggestions welcome.
dado

[dadod]

This is finall tested shunt regulator version. I built one channel for now, tested it with no load and with a load and it looks stable and no visible riple or high frequency oscilation.
Now I have to assemble second channeland test it with the lineamp(GainWire).
dado

[keantoken]

You could integrate D3 and D5 with R3 for lower DC impedance and less parts.

[dadod]

Originally Posted by keantoken

You could integrate D3 and D5 with R3 for lower DC impedance and less parts.

What you mean by integrate, could you explain? Look post #191 and #192.

[keantoken]

Replace R3 with D3 and R22.

[dadod]

Originally Posted by keantoken

Replace R3 with D3 and R22.

I don't think that is a good idea.

[keantoken]

Originally Posted by dadod

I don't think that is a good idea.

There is a way to find out.

[smms73]

Dado it looks very good
How about using those supertex depletion mosfet in place of the jfet's? They have higher early voltage than the 2sk170 at those low Vds. I just do not know if they are noisier.
I will buy some of this deplection mosfets for triyng some ideas.
You can also cascode the main current sources for higher output impedance of the ccs. But your regulator is very good as it is.