A low-voltage CMOS bandgap reference circuit with improved power supply rejection

Author

Mohieldin, Ahmed N. ; Elbahr, Haidi ; Hegazi, Emad ; Mostafa, Marwa

Author_Institution

RF/Analog & Mixed-Signal Bus. Unit, SYSDSoft Incorporation, Cairo, Egypt

fYear

2010

fDate

19-22 Dec. 2010

Firstpage

343

Lastpage

346

Abstract

This paper presents a CMOS low-voltage bandgap reference circuit with improved power supply rejection (PSR). The analysis of the reference circuit shows the required condition to achieve high PSR. The proposed circuit incorporates a feedback loop to insure that the condition for high PSR is achieved across process variations and temperature drifts. The design has been implemented in 130nm CMOS process. It consumes 70μA from a single 1.2V supply. Simulation results show an improvement of more than 15dB in low frequency PSR due to the additional feedback loop. The theoretical and simulation results are in close agreement.

Keywords

CMOS integrated circuits; integrated circuit design; low-power electronics; reference circuits; PSR; current 70 muA; feedback loop; improved power supply rejection; low-voltage CMOS bandgap reference circuit; process variations; simulation results; size 130 nm; temperature drifts; theoretical results; voltage 1.2 V; CMOS integrated circuits; Design methodology; Feedback loop; Negative feedback; Photonic band gap; Radio frequency; Switching circuits;

fLanguage

English

Publisher

ieee

Conference_Titel

Microelectronics (ICM), 2010 International Conference on

Conference_Location

Cairo

Print_ISBN

978-1-61284-149-6

Type

conf

DOI

10.1109/ICM.2010.5696156

Filename

5696156