Title :
A novel low voltage Subtracting BandGap Reference with temperature coefficient of 2.2 ppm/°
Author :
Zhu, Wen-rui ; Yang, Hai-gang ; Gao, Tong-qiang
Author_Institution :
Inst. of Electron., Beijing, China
Abstract :
A novel structure of CMOS low voltage bandgap reference, called "Subtracting BandGap Reference" (SBGR), is proposed. In this work, the extremely small temperature coefficient is obtained by subtracting two Complementary To Absolute Temperature (CTAT) currents with same temperature coefficient but different magnitude. The subtraction of two CTAT currents which have similar characteristics leads to low temperature coefficient. Simulation results show that the new SBGR circuit achieves a temperature coefficient three times lower than that of the conventional low voltage bandgap reference.
Keywords :
CMOS integrated circuits; CMOS low voltage bandgap reference; absolute temperature current; low voltage subtracting bandgap reference; temperature coefficient; CMOS integrated circuits; Low voltage; Photonic band gap; Resistance; Solid state circuits; Temperature; Temperature dependence;
Conference_Titel :
Circuits and Systems (ISCAS), 2011 IEEE International Symposium on
Conference_Location :
Rio de Janeiro
Print_ISBN :
978-1-4244-9473-6
Electronic_ISBN :
0271-4302
DOI :
10.1109/ISCAS.2011.5938057
