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1 V CMOS current references for wide-temperature range applications

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4 Author(s)
B. Calvo ; Group of Electronic Design-I3A, University of Zaragoza, Zaragoza E-50009, Spain ; C. Azcona ; N. Medrano ; S. Celma

Two new low-voltage micropower first-order temperature-compensated CMOS current references are presented. To achieve compact architectures able to operate under low voltage with low power consumption, the references are based on the simplest approach of cross-coupled current mirrors, and compensation is obtained by introducing a temperature-dependent current mirror ratio. Results for 0.18 μm CMOS implementations show that the proposed 1 μA references operate with supplies down to 1 V showing temperature drifts below 231 ppm/°C over a (from -40 to 120°C) range.

Published in:

Electronics Letters  (Volume:49 ,  Issue: 17 )