A Simulated Study of 65 nm CMOS 2GHz Front-End Preamplifier Circuit for Optical Fiber Applications

In this research a new design of the transimpedance amplifier (TIA) with current mirror was employed by technique (65nm). The TIA consists common gate transistor (CG TIA) and source as an input stage local active feedback second to increase gain. order verify performance proposed TIA, circuit simulation carried out in LT spice program using coefficients (65nm CMOS). results indicate that interfacial impedance gain is (41 dBΩ) at bandwidth frequency (2.0 GHz-3dB) for capacitor (100 fF) referred noise spectral density (14 pA/√Hz) power consumption value (0.091 mw) applied voltage (1V). main focus low compared another research.