Title :
A bandgap reference circuit utilizing switching to reduce offsets and a novel technique for leakage current compensation
Author :
Atrash, A.H. ; Aude, Arlo
Author_Institution :
Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
A bandgap reference circuit is presented in a 0.13 μm process. Switching techniques are used to eliminate the effects of mismatch in the op amp and current source devices. A novel leakage current compensation technique allows bandgap operation to 200°C. The circuit demonstrates a variation of 1.6 mV over 150°C and has a temperature coefficient of 13.3 ppm/°C. A digital control block necessary for the switching technique is also presented.
Keywords :
CMOS analogue integrated circuits; circuit switching; compensation; constant current sources; leakage currents; operational amplifiers; reference circuits; 0.13 micron; 1.6 mV; 150 degC; 200 degC; CMOS analogue integrated circuits; bandgap reference circuit; current source device; digital control; leakage current compensation; operational amplifier; switching techniques; temperature coefficient; Digital control; Leakage current; Leg; Operational amplifiers; Photonic band gap; Resistors; Semiconductor diodes; Switching circuits; Temperature; Voltage;
Conference_Titel :
Circuits and Systems, 2004. NEWCAS 2004. The 2nd Annual IEEE Northeast Workshop on
Print_ISBN :
0-7803-8322-2
DOI :
10.1109/NEWCAS.2004.1359090
