I am doing literature research about Transimpedance Amplifier (TIA) architecture and designs. What I know for sure are its input is current, its output is voltage and it has low input and output impedance.
But I found some publications that use OTA+Resistive feedback to form a TIA. It makes me question some fundamentals understanding that I have so far.
- Is the topology like this VCVS(Opamp) or VCCS(OTA)? There is this discussion as well but it did not give a conclusion.
- If I have Current Amp and I dump this current into a resistor, does it make the circuit to become TIA? I do not think so, because we need to consider the impedance also at the input and output port.