A wide power voltage reference with high-order curvature compensation

A innovativevoltage reference generator topologyis presents in this paper.The design introducesa high-order curvature-compensation and a power preliminary adjustment structure toimprove the precision of voltage reference.The proposed design was implemented in a BCD process.Simulationresults have shown typicaltemperature coefficients as low as 1.4ppm/℃ overa temperature range of-20℃~125℃.The voltage variation is 0.000 66% when operate voltage changes from 3 V to 40 V. The proposed voltage reference can be used in the design which requires wide power supply voltage input and high precision voltage reference.