Current conveyor as a voltage amplifier

[dadod]

The shunt regulator was tested and adjusted to the +-32 V on both channels.Positive and negative output voltages are quite indentical and the adjustmen was done only with one trimmer pot per channel.
Here are the final circuit diagram and PCB layout. The circuit diagram shows one channel of the CCS - shunt part, and PCB was made with separate supplys for the stereo channels.
Damir

 

[31697B]

Couldnt one put a three terminal regulator IC for the shunt portion ... across the line. the topology is similar.

Thx-RNMarsh

 

[dadod]

Couldnt one put a three terminal regulator IC for the shunt portion ... across the line. the topology is similar.

Thx-RNMarsh

Yes probably, but could you suggest one to be used for 32V as a shunt.
And I will lose the feature of a simple adjustment both polarities with just one trimpot.
BR Damir

 

[dadod]

First listening with the new power supply. So far so good, no hum, no noise and the music is beautiful.
A time to put it to a some nice box.
Damir

 

[Joachim Gerhard]

cool.

 

[bogdan_borko]

Great work! Could you post psrr and output impedance graph for the finall version?

 

[dadod]

Great work! Could you post psrr and output impedance graph for the finall version?

Here are for the Gaiwire, but only simulated.

 

[bogdan_borko]

Sorry, I meant for the sunt reg...

 

[dadod]

Sorry, I meant for the sunt reg...

Look here http://www.diyaudio.com/forums/anal...onveyor-voltage-amplifier-20.html#post3373538

 

[31697B]

Yes probably, but could you suggest one to be used for 32V as a shunt.
And I will lose the feature of a simple adjustment both polarities with just one trimpot.
BR Damir

A series transistor with the 3-term shunt reg will keep the IC 3-term reg Ok to any voltage needed. Has anyone done this --- using two 3-term regs for a series/shunt reg circuit?

Thx-RNMarsh

 

[bogdan_borko]

Look here http://www.diyaudio.com/forums/anal...onveyor-voltage-amplifier-20.html#post3373538

I`ve seen that but thers no psrr graph?

 

[dadod]

Sorry Bogdan, I was occupied with other things. Here is the shuntreg PSRR.
Because I did not find IRF640 model I used IRF530 model instead in the negative polarity, and that shows some small diference(probably).
Damir

 

[bogdan_borko]

I asked yo becose I get different data in microcap. Do you measure it the same way with AC analysis?
db(v(OUT)/v(in)) where v(OUT) is the regulator output voltage and v(in) is ac voltage at the regulator input (before ccs).

 

[dadod]

I forgot to remove 1000u caps at the reg input, here is without those caps.
To get PSRR I change DC sources to AC sources with DC offset of 42V and make them AC1, then plot 1/v(vout).

 

[dadod]

Assemblig progress.

 

[padamiecki]

cheers!

 

[dadod]

I am listening for a few days now this line/headphone amp and I am very, very satisfied with the music coming out of it.
The skeleton and the muscle are finished and now I have to put some skin around it. Final schematic is here and some photographs too.
BR Damir

 

[padamiecki]

I am listening for a few days now this line/headphone amp and I am very, very satisfied with the music coming out of it.
The skeleton and the muscle are finished and now I have to put some skin around it. Final schematic is here and some photographs too.
BR Damir

lucky you!😀
please send asc file for last version
thank you in advance
PS I am going to build it too as pre for power buffer, but when???🙄

 

[dadod]

lucky you!😀
please send asc file for last version
thank you in advance
PS I am going to build it too as pre for power buffer, but when???🙄

Thank you padamiecki,
Here is the last file.
BR Damir

 

[Telstar]

Very nice thread 🙂
What's the gain and can you post FFT with 1VAC input, at 20khz?