Feedback Transimpedance Amplifier Design

Feedback Transimpedance Amplifier Design project requires LT spice .

In this assignment, you will design a simple feedback network for a transimpedance amplifier. The goal is
to achieve an order of magnitude improvement in the bandwidth compared to the open-loop version of
the transimpedance amplifier.

A transimpedance amplifier is designed as a common-source
stage as on the left. The design parameters are as follows: ??? =
5 ?, ????? = 3.9 ?, (
?
?
)
1
=
3.25 ??
1 ??
, (
?
?
)
2
=
10 ??
1 ??
, ?? = 100 ?,
??
‘ = 40 ??
?2
, ??
‘ = 120
??
?2
, ??? = 0.8 ?, ??? = -0.9 ?, ?? =
100 ?O, ???? = ???? = 1
??
?
.
1. For the values above, calculate
??1,??2, ??1, ??2,???1,???2, ??1, ??2, ??? ??????? ???? =
?? =
????
???
.
2. Simulate the circuit in LTSpice. Use nmos4 and pmos4
models. Connect nmos4 bulk to ground. Connect pmos4 bulk to
VDD. Refer to SPICE Assignment 2 document for entering W and L
values of the devices. Enter “.model pmos pmos (kp=40e-6, vt0=-
0.9, cgso=1n, cgdo=1n, lambda=0.01)” and “.model nmos nmos (kp=120e-6, vt0=0.8, cgso=1n,
cgdo=1n, lambda=0.01)” for remaining device parameters as shown below.