How to give input current of a TIA?

[Tshering Sangmo Sherpa]

How to give Iin of trans impedance amplifier

 

[FvM]

In simulation or hardware testbench?

 

[Tshering Sangmo Sherpa]

In simulation or hardware testbench?

simulation in cadence.

 

[dick_freebird]

You would force it with a current source, or measure the
current through a forcing voltage source / network to the
input node.

 

[Tshering Sangmo Sherpa]

You would force it with a current source, or measure the
current through a forcing voltage source / network to the
input node.

how can i give that current source imitating pulses of an Avalanche photo diode?

 

[dick_freebird]

You would start by looking at one and quantifying its interesting
features. But so far you have only shown an ideal source output.

Are you asking me to teach you basic SPICE? Seems you are
unwilling to read the manual.

An APD is a very finicky sensor and must be kept at the right bias
if you want multiplication, and a model worth anything would
have to emulate this and the excess noise / random false trigger
that lies on the other side of "just right".

In addition to not wanting to understand the simulator, it seems
looking for vendor support for a specific APD wasn't worth doing
either? Those are the people who ought to be giving you free
models as applications support.