How to simulate an ideal fully differential amplifier?

Hello Dmil, 

 Since TINA is a DesignSoft/TINA program, questions are handled by using the DesignSoft support page: http://www.tina.com/technical-support/  .

The DesignSoft/TINA team is very helpful and this is the most direct way for TINA support.  Please advise by Reply when the issue has been resolved.    

Regards, 

~Leonard 

Hi Dmil,

I don' understand. What exactly do you want to simulate?

Kai

Hi Kai,

I want to built a simple model of an ideal FDA to use it if an actual FDA model is not available.

In symmetrical connection a VCVS can be used. In a non-symmetrical connection there is a problem with VCVS because FDA has internal feedback from the middle output voltage.

I would like to find the simplest way to fix this problem using common models like VCVS.

Hi Leonard,

I think, I found a solution. 2 VCVS are required.

The model is attached.0576.FDA_vs_VCVS.TSC

Hi Dmil,

keep in mind that using an ideal FDA model will help only in the very simplest applications. It's way more useful to the take the original TI's Spice model.

Kai

Hi Kai,

It is better than nothing :)

Parasitic can be added to make it more realistic.