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Low noise low voltage sub bandgap reference voltage with PTAT current generator

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1 Author(s)
Muhammad M. El Kholy ; Si-Ware Systems Corporation

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.

Published in:

2009 4th International Design and Test Workshop (IDT)

Date of Conference:

15-17 Nov. 2009