Title :
A novel, low voltage, precision CMOS current reference with no external components
Author :
Dehghani, Rasoul ; Atarodi, S. Mojtaba
Author_Institution :
Dept. of Electr. Eng., Sharif Univ. of Technol., Tehran, Iran
Abstract :
A novel, precision current reference with low temperature and supply sensitivity and without any external component has been designed in a 0.18μm CMOS mixed-mode process. The circuit is based on a bandgap reference (BGR) voltage and a CMOS circuit like a beta multiplier. The simulation results show max-to-min fluctuation of about 1% over a temperature range of -20 °C to +100 °C and supply voltage range of 1.1 V to 2V with ±30% tolerance for all of the used on-chip resistors. The maximum nominal current variation in process corners is less than 3.5%.
Keywords :
CMOS integrated circuits; low-power electronics; mixed analogue-digital integrated circuits; multiplying circuits; operational amplifiers; reference circuits; -20 to 100 C; 1.1 to 2 V; CMOS mixed-mode process; bandgap reference voltage; beta multiplier; low supply sensitivity; low temperature sensitivity; low voltage; max-to-min fluctuation; maximum nominal current variation; operational amplifiers; precision current reference; startup circuit; CMOS process; CMOS technology; Capacitors; Circuits; Feedback loop; Low voltage; Operational amplifiers; Photonic band gap; Resistors; Temperature sensors;
Conference_Titel :
Electronics, Circuits and Systems, 2003. ICECS 2003. Proceedings of the 2003 10th IEEE International Conference on
Print_ISBN :
0-7803-8163-7
DOI :
10.1109/ICECS.2003.1302000
