Abstract
A CMOS voltage reference, based on body bias technique, has been proposed and simulated using SMIC 0.18μm CMOS technology in this paper. The proposed circuit can achieve a temperature coefficient of 19.4ppm/°C in a temperature range from −20°C to 80°C, and a line sensitivity of 0.024mV/V in a supply voltage range from 0.85V to 2.5V, without the use of resistors and any other special devices such as thick gate oxides MOSFETs with higher threshold voltage. The supply current at the maximum supply voltage and at 27°C is 214nA. The power supply rejection ratio without any filtering capacitor at 10Hz and 10kHz are −88.2dB and −36dB, respectively.
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