Title :
Low noise low voltage sub bandgap reference voltage with PTAT current generator
Author_Institution :
Si-Ware Syst. Corp., Cairo, Egypt
Abstract :
Low voltage bandgap references are vital blocks in all analog systems. In this paper, a modified sub bandgap reference voltage with PTAT current generator is presented. The traditional sub BG circuit generates 0.8 V with thermal noise 197 nV/¿(Hz) for 71 uA, while the modified circuit achieves 157 nV/¿(Hz) for 47 uA. The technology used is AMS 0.35 um. The minimum supply voltage in this technology is 1.2 V with normal devices due to its high threshold voltage. That BG is working properly from 1.2 V to 4 V with 400 ppm/V.
Keywords :
CMOS analogue integrated circuits; energy gap; PTAT current generator; analog systems; current 47 muA; low-noise subbandgap reference voltage; low-voltage bandgap reference; size 0.35 mum; thermal noise; threshold voltage; voltage 0.8 V; voltage 1.2 V to 4 V; CMOS process; CMOS technology; Circuit noise; Low voltage; Mirrors; Noise generators; Photonic band gap; Temperature; Thermal resistance; Threshold voltage; Low-supply bandgap reference; PTAT current generator; bias cell; low noise bandgap;
Conference_Titel :
Design and Test Workshop (IDT), 2009 4th International
Conference_Location :
Riyadh
Print_ISBN :
978-1-4244-5748-9
DOI :
10.1109/IDT.2009.5404101
