A low power supply CMOS bandgap reference voltage generator used current differential amplifier and DTMOST diode

In this paper, a referenced voltage of 711mV CMOS band-gap referenced circuit with supply voltage of 0.9V is proposed and implemented. The current differential amplifier is used to replace the voltage differential amplifier to avoid the use of resistors. The start-up circuit with capacitor version of voltage division is used to decrease power dissipation. The implement results show that 4.3mV referenced voltage variation while the supply voltage variation from 0.9 V to 1.1V. The referenced voltage variation is 2mV while temperature variation is -20 °C to 120°C. The power dissipation of this circuit is 15.28μW The active area of this circuit is 189μm×120μm.