I have 2 TFT transistors. 

I want to wire them so that:

* I force a current through both of them
* I get the difference in their voltage output.
* How would I amplify deltaV?

What would the circuit diagram look like?


##EDIT more detail
I want to send a current pulse trough Source-Drain of transistor 1--> this should cause a voltage in the Gate (VG1). 

I want to send an equal current pulse through Source-Drain of Transistor 2--> this should create a second Voltage (VG2)

Then I want to measure the difference VG2-VG1