A Temperature Compensated Beta-Multiplier Based Sub-1 V Voltage Reference Circuit for Low-Voltage Applications

A beta-multiplier based voltage reference circuit is proposed here that generates a reference voltage of $\approx$0.6V for low-voltage analog and mixed-signal applications. The circuit is designed in SCL 0.18 $\mu$m standard CMOS technology under 1.8 V power supply. The circuit offers a line regulation of 0.16% N over the range of 1.8 V to 3.5 V supply voltage variation. A stable response with a temperature coefficient of 42.5ppm/°C is obtained for temperatures varying between industry-standard temperature range of -40° C to +85° C. The proposed circuit offers a power supply rejection ratio (PSRR) of -42.1dB at lowfrequency range up to 1 MHz frequency. The circuit draws a total current of 19.47 $\mu$A from the power supply resulting in overall power consumption of 35.05 $\mu$W which is quite comparable with the very recent existing reported works.