Mpp

[sampler]

Originally Posted by Stefanoo

Interesting.
Would you mind elaborate the circuit with IRF9610?

Replace ZVP4525 with IRF9610 or any other Pmos with reasonably low Coss and bias it properly for required current.

Originally Posted by Stefanoo

Apparetly circuit doesn't seem to operate in my simulator.

Sorry to hear that.

Originally Posted by Stefanoo

Also, if you don't mind where did you get the model for the gyrator?
I have never used this device before.

Not sure what you mean, but ZVP4525 spice model can be found here.

[Stefanoo]

Originally Posted by Joachim Gerhard

Well, it is more like doubled, anyway.

yes I see your point.
I was looking at one of the link you posted before and made me want to use the IF3601 for this
The dual package monolithic will achieve an extremely low noise and thermally coupled if CCS is stable should lead to a simple but extreely low noise and thermally stable design.
What do you think?

Anyway like I said I would like to have the model up on my simulator to be able to make modifications for everybody.

Otherwise sampler could be doing that work if he feels like, I don't mind doing it if he is busy.
Still I would like an explanation as to why his model works is it because of the current set on the CCS?

EDIT: Thanks Sampler for the extra info, I will try to see if I can work this issue out.

[Joachim Gerhard]

The IF3901 is like a pink elephant or a unicorn if you wish.
Can not wait until you get some Stefano.
The CSS has to provide THE EXACT SAME CURRENT THEN THE INPUT STAGE PROVIDES AT IDDLE, ALL THE TIME. If that does not happen the DC voltage at the output node is not EXACTLY at 1/2 voltage of the supply. That condition gives the MAXIMUM DYNAMIC RANGE ( Tietze- Schenk ).

[Joachim Gerhard]

Tietze-Schenk Homepage

[Joachim Gerhard]

High Way the Hard Way :Tietze-Schenk Homepage
There is an english edition.

[Joachim Gerhard]

Richard Dobson - Hard By The Highway - YouTube

[Joachim Gerhard]

It is wise to use P-Channel Mosfets, Sampler. They are much less noisy then the N-Cannel variety.
You can find that here :Analog Design Essentials, Sansen

[Joachim Gerhard]

Here we go.Secrets of the Beehive - Wikipedia, the free encyclopedia

[Joachim Gerhard]

Question :
What kind of P-Channel Mosfet has the least noise provided that you run it on 10 times the idle then a comparable BJT ?
You can win one bottle of Los Royales Reserva 2007.

[FdW]

Originally Posted by Joachim Gerhard

Question :
What kind of P-Channel Mosfet has the least noise provided that you run it on 10 times the idle then a comparable BJT ?
You can win one bottle of Los Royales Reserva 2007.

I really do not know, but if I was guessing I would go like this, the larger the mosfet the better in actual fact a large (hexfet) mosfet is a matrix of paralleled fets and thus the more in parallel the better. Thus I think the larger the dye the better. Just my guestimate! You know where to send that bottle