I'm studying how to use LT1999-20 for a project and I have simulated a circuit to learn about it.
I want to amplify an AC current signal, so I simulate next circuit.
I adjust VRef to 1.41 V in both circuits and I add a current source but it is ZERO. The difference between circuits is the resistance. In the left cirucit, it is 1 ohm and in the right circuit is 100.
When I simulated the circuits, I get the following results:
Vout of the left circuit is in red, and it is 1.42 V and Vout of the right circuit is 2.32 V.
In theory, Vout shall be 1.41 V because of the current is zero and both circuits have 1.41V VRef.
I don't know why this difference exists if I change the resisteance and I have searched for information in the datasheet, but I don't find where the trouble is.
I will appreciate any information about this.