A linear and wide dynamic range transimpedance amplifier with adaptive gain control technique

A linear and wide dynamic range transimpedance amplifier (TIA) for the pulsed time-of-flight imaging LADAR application has been designed and simulated in a 0.18 mu m 3.3 V CMOS technology. Specific design techniques, including adaptive gain control technique to widen linear dynamic range, pseudo-differential structure of the front end to decrease the common-mode noise and noise minimization to improve SNR, have been proposed to achieve challenging designs goals with linear dynamic range of 5000:1, high transimpedance gain of 89 dB Omega, bandwidth up to 150 MHz, equivalent input-referred noise current less than 8 , in 2 pF photodiode parasitic capacitance. The proposed TIA consumes 165 mW with 3.3 V power supply.