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Design of low-voltage bandgap reference using transimpedance amplifier

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2 Author(s)
Yueming Jiang ; Dept. of Electr. & Comput. Eng., Iowa State Univ., Ames, IA, USA ; Lee, E.K.F.

The minimum supply voltage for implementing a typical bandgap reference is usually over 1.8 V. This minimum is mainly due to the limited input common-mode range of the opamp used in the bandgap reference. In this work, a low-voltage bandgap reference using a transimpedance amplifier that does not have this limitation is proposed and some of the design considerations for the proposed technique are briefly discussed. Based on this technique, a 1.2-V bandgap reference was implemented in a 1.2-μm CMOS process (VTN≈0.53 V and VTP≈-0.91 V) with bipolar option. The variations of the output voltage over temperature (0°C⩽T⩽100°C) were measured to be less than ±1%

Published in:

Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on  (Volume:47 ,  Issue: 6 )

Date of Publication:

Jun 2000

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