BiCMOS cascaded bandgap voltage reference

Author

Filanovsky, I.M. ; Chan, Yiu Fai

Author_Institution

Alberta Univ., Edmonton, Alta., Canada

Volume

2

fYear

1996

Firstpage

943

Abstract

A bandgap voltage reference with a circuit providing compensation of the thermal nonlinearity for the base-emitter voltage is described. The temperature dependence of V_BE(T) is linearized using, as the bias current, a sum of two currents one of which is proportional to the third degree, and another to the fourth degree of absolute temperature. Two versions of the circuit are given, one is designed for 5 V, and another for 3 V supply voltage. Theoretical calculations show that the thermal instability of the output reference voltage can be reduced down to 0.2 ppm/°C. The simulation results for the circuits obtained by extraction from the layouts with non-protected pads give the figures of 4 ppm/°C (5 V power supply) and 8 ppm/°C (3 V power supply) in the range -50°C to 180°C

Keywords

BiCMOS analogue integrated circuits; cascade networks; circuit stability; compensation; linearisation techniques; reference circuits; thermal stability; -50 to 180 C; 3 V; 5 V; BiCMOS bandgap voltage reference; base-emitter voltage; bias current; cascaded bandgap voltage reference; compensation; output reference voltage; temperature dependence; thermal instability; thermal nonlinearity; Circuits; Doping; Equations; Joining processes; Photonic band gap; Taylor series; Temperature dependence; Temperature distribution; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1996., IEEE 39th Midwest symposium on

Conference_Location

Ames, IA

Print_ISBN

0-7803-3636-4

Type

conf

DOI

10.1109/MWSCAS.1996.588110

Filename

588110