Hi,

I am designing a TIA using inverter amplifier configuration. I am trying to figure the gain numbers obtained in the AC analysis.

Firstly, the TIA uses a resistor feedback configuration with input current set at 50uA, and the DC node voltage after simulation at the output is at 473 mV, this leads to a TI Gain of 20log(473m/0.05m)=79 dBohm

I checked it with the AC analysis plot of gain and the maximum turns out to be around 50dB

Now I am not certain about the procedure of determining the TI gain using ADE. I took a current source for the input whose ac magnitude is set to be 1 and Dc current as 50uA. After the simulations, I chose results>main form>selected the output node and dB scale. Is this is a right way to determine the transimpedance gain?