Abstract
This paper describes a high precision high order curvature compensated bandgap voltage reference in a 0.5-mum 2P3M n-well mixed signal CMOS technology. This newly proposed bandgap voltage reference utilizes a Buck's voltage transfer cell and a temperature independent current, to provide a high order compensation of the VBE-Cascode structures are also introduced in this bandgap voltage reference to improve the power supply rejection ratio (PSRR). This circuit achieves 5.6 ppm/degC of temperature coefficient with temperature ranging from -20 to 100degC at 5 V power supply. The variation in the output voltage of the bandgap voltage reference is 0.4 mV when VDD varies from 4 V to 6 V.
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