Design of a Bandgap Voltage Reference Circuit in 90 nm CMOS Process

Due to the ability to produce a constant voltage that is unaffected by temperature fluctuations, Bandgap Reference (BGR) circuits plays a crucial role to provide a persistent power to Integrated Circuits. In this work, a BGR circuit is designed in 90 nm CMOS process. This circuit can operate in temperature range between $-40^{\circ} \mathrm{C}$ and $160^{\circ} \mathrm{C}$. The proposed BGR circuit shows stability of $0.7 \%$. At a supply voltage of 1.4 V, the circuit provides a reference voltage of 1.262 V. At this operating condition, the circuit draws $1.4 \mu \mathrm{~A}$ of current, which corresponds to $1.6 \mu \mathrm{~W}$ of power consumption.