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A 2-V 23-μA 5.3-ppm/°C curvature-compensated CMOS bandgap voltage reference

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3 Author(s)
Ka Nang Leung ; Dept. of Electr. & Electron. Eng., Hong Kong Univ. of Sci. & Technol., China ; Mok, P.K.T. ; Chi Yat Leung

A high-order curvature-compensated CMOS bandgap reference, which utilizes a temperature-dependent resistor ratio generated by a high-resistive poly resistor and a diffusion resistor, is presented in this paper. Implemented in a standard 0.6-μm CMOS technology with Vthn≈|Vthp|≈0.9 V at 0°C, the proposed voltage reference can operate down to a 2-V supply and consumes a maximum supply current of 23 μA. A temperature coefficient of 5.3 ppm/°C at a 2-V supply and a line regulation of ±1.43 mV/V at 27°C are achieved. Experimental results show that the temperature drift is reduced by approximately five times when compared with a conventional bandgap reference in the same technology.

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:38 ,  Issue: 3 )

Date of Publication:

Mar 2003

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