Title :
Optimal curvature-compensated BiCMOS bandgap reference
Author :
Popa, Cosmin ; Mitrea, Octavian
Author_Institution :
Fac. of Electron. & Telecommun., Bucharest Politechnica Univ., Romania
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 VBE(T) is linearized using, as the bias current, a current which is proportional with the n-th degree of absolute temperature. Theoretical calculations show that the thermal instability of the output reference voltage can be strongly reduced if the parameter n is choosen equal with a value fixed only by the technological process. The curvature-corrected bandgap voltage reference is implemented in BiCMOS technology and presents a very small temperature coefficient. SPICE simulation using MOSIS 0.8μ is used to verify the analysis
Keywords :
BiCMOS integrated circuits; SPICE; circuit optimisation; circuit stability; compensation; reference circuits; thermal stability; BiCMOS bandgap reference; MOSIS 0.8μ; SPICE simulation; base emitter voltage; circuit analysis; optimal curvature-compensated reference; thermal instability; thermal nonlinearity compensation; voltage reference; Analytical models; BiCMOS integrated circuits; Instruments; Photonic band gap; Polarization; Regulators; SPICE; Taylor series; Temperature dependence; Voltage measurement;
Conference_Titel :
Image and Signal Processing and Analysis, 2001. ISPA 2001. Proceedings of the 2nd International Symposium on
Conference_Location :
Pula
Print_ISBN :
953-96769-4-0
DOI :
10.1109/ISPA.2001.938682
