Design of a bandgap reference circuit for driving resistance load with low impedance

This paper describes the design of a bandgap Reference for driving low impedance, simulated in 0.35µm CMOS technology. The circuit generates a reference voltage of 1.23V and has a temperature coefficient of 0.02mV/K at 27C. It can operate with supply voltages between 2.5V and 6V and between 0C and 100C. It has a PSRR of 41dB under normal operating conditions. This circuit works in a current feedback mode, and it generates its own reference current, resulting in a stable operation. A startup circuit is required for successful operation of the system. Variation of the reference voltage with RL from 40_ to 200_ at 27°C_is 4mV.