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New Curvature-Compensation Technique for CMOS Bandgap Reference With Sub-1-V Operation

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2 Author(s)
Ming-Dou Ker ; Nanoelectronics & Gigascale Syst. Lab., Nat. Chiao Tung Univ., Hsinchu ; Jung-Sheng Chen

A new sub-1-V curvature-compensated CMOS bandgap reference, which utilizes the temperature-dependent currents generated from the parasitic n-p-n and p-n-p bipolar junction transistor devices in the CMOS process, is presented. The new proposed sub-1-V curvature-compensated CMOS bandgap reference has been successfully verified in a standard 0.25-mum CMOS process. The experimental results have confirmed that, with the minimum supply voltage of 0.9 V, the output reference voltage at 536 mV has a temperature coefficient of 19.5 ppm/degC from 0 degC to 100 degC. With a 0.9-V supply voltage, the measured power noise rejection ratio is -25.5 dB at 10 kHz

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Circuits and Systems II: Express Briefs, IEEE Transactions on  (Volume:53 ,  Issue: 8 )