Input impedance of tia

[transign]

Hi, which is the input impedance of the circuit presented ?

Thanks!

 

[danadakk]

Use a simple model and write the loop and node equations, and then
use PFE to extract the input RLC lumped elements for Zin ?

Small Signal Model of MOSFET - EEEGUIDE.COM

If the small bulk resistances of the source and drain are neglected, the Small Signal Model of MOSFET and its equivalent circuit between

www.eeeguide.com

Or DC model :

Regards, Dana.

 

[transign]

for the transistor working as a TIA which is the equal dependent source of the small signal model? the one above is as voltage amplifier operation

 

[danadakk]

gm*Vgs output current source of either model is the dependent
source, the internal gain element of the Transistor. The MOSFET
is basically a V to I transfer function.

http://www.ittc.ku.edu/~jstiles/312/handouts/Steps%20for%20MOSFET%20Small%20Signal%20Analysis.pdf

Regards, Dana.,