This paper presents a design of the transimpedance amplifier
using 0.35µm CMOS technology. In the proposed
transimpedance amplifier, feedback resistor RF of
conventional transimpedance amplifier has been replaced by
NMOS transistor as an active feedback resistor. This circuit
operates at 3.3V power supply voltage and for a photocurrent
of 0.5µA.The proposed transimpedance amplifier having low
noise, high gain and large dynamic range. The simulated
results of transimpedance gain in single stage and three stage
transimpedance amplifiers is 4.43 MΩ and 4.39 MΩ at gate
voltage of 0.4V. Power dissipation of single stage and three
stage transimpedance amplifier is 602.04 µW and 1.781mW at
gate voltage of 2.0V.