Low-voltage bandgap reference with temperature compensation based on a threshold voltage technique

Author

Bendali, A. ; Savaria, Y.

Author_Institution

Dept. of Electr. & Comput. Eng., Ecole Polytech. de Montreal, Que., Canada

Volume

3

fYear

2002

fDate

6/24/1905 12:00:00 AM

Abstract

In this paper, we describe a sub 1 V bandgap voltage reference (BGR) in CMOS technology. The proposed topology is based on a current-mode bandgap structure that uses a transimpedance amplifier. A feedback control in the bandgap produces temperature compensation between a PTAT (Proportional To Absolute Temperature) current and a CTAT (Conversely proportional To Absolute Temperature) current derived from a nMOS threshold voltage. The proposed circuit was verified by extensive circuit simulations, using models, of a standard 0.18 μm CMOS technology, with a power supply of 1 V. The variations of the output voltage over a typical temperature range (0 to 100°C) were simulated to be less than 1%.

Keywords

CMOS analogue integrated circuits; circuit feedback; circuit stability; compensation; current-mode circuits; low-power electronics; reference circuits; 0 to 100 degC; 0.18 micron; 1 V; CMOS technology; LV reference circuit; current-mode bandgap structure; feedback control; low-voltage bandgap reference; nMOS threshold voltage; temperature compensation; threshold voltage technique; transimpedance amplifier; CMOS technology; Circuit simulation; Circuit topology; Feedback control; MOS devices; Photonic band gap; Power supplies; Semiconductor device modeling; Temperature; Threshold voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on

Print_ISBN

0-7803-7448-7

Type

conf

DOI

10.1109/ISCAS.2002.1010195

Filename

1010195