Design of low-voltage bandgap reference using transimpedance amplifier

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-/spl mu/m CMOS process (V/sub TN//spl ap/0.53 V and V/sub TP//spl ap/-0.91 V) with bipolar option. The variations of the output voltage over temperature (0/spl deg/C/spl les/T/spl les/100/spl deg/C) were measured to be less than /spl plusmn/1%.

[1]  Y. Matsuya,et al.  1V power supply, 384 ks/s 10b A/D and D/A converters with swing-suppression noise shaping , 1994, Proceedings of IEEE International Solid-State Circuits Conference - ISSCC '94.

[2]  B.M.J. Kup,et al.  A DSP-based hearing instrument IC , 1997, IEEE J. Solid State Circuits.

[3]  K. Sakui,et al.  A CMOS bandgap reference circuit with sub-1-V operation , 1999 .

[4]  Gabriel A. Rincon-Mora,et al.  Designing 1-V op amps using standard digital CMOS technology , 1998 .

[5]  R. Griffith,et al.  A 1 V BiCMOS rail-to-rail amplifier with n-channel depletion-mode input-stage , 1997, 1997 IEEE International Solids-State Circuits Conference. Digest of Technical Papers.

[6]  A.-J. Annema,et al.  Low-power bandgap references featuring DTMOSTs , 1999, Proceedings of the 24th European Solid-State Circuits Conference.