A compact low-noise fully differential bandgap voltage reference with intrinsic noise filtering

Author

Longhitano, A.N. ; del Cesta, F. ; Bruschi, P. ; Simmarano, R.

Author_Institution

Dipt. di Ing. dell´Inf., Univ. of Pisa, Pisa, Italy

fYear

2014

fDate

June 30 2014-July 3 2014

Firstpage

1

Lastpage

4

Abstract

A new architecture for differential bandgap voltage references is presented. The system is based on a switched capacitor amplifier that performs correlated double sampling to cancel offset and reduce flicker noise while maintaining a valid output voltage throughout the clock cycle. The circuit noise is filtered by an intrinsic discrete time low-pass function with tunable cut-off frequency. A prototype designed with 0.18 um CMOS process is described. Preliminary performances are estimated by means of periodic noise analysis carried out with the SpectreRF simulator.

Keywords

CMOS analogue integrated circuits; differential amplifiers; flicker noise; integrated circuit noise; low noise amplifiers; low-pass filters; reference circuits; switched capacitor networks; CMOS process; SpectreRF simulator; circuit noise; clock cycle; compact low-noise fully differential bandgap voltage reference; correlated double sampling; flicker noise reduction; intrinsic discrete time low-pass function; intrinsic noise filtering; offset cancellation; output voltage; periodic noise analysis; size 0.18 mum; switched capacitor amplifier; tunable cut-off frequency; 1f noise; CMOS integrated circuits; Capacitors; Clocks; Photonic band gap; Switches; correlated double sampling; differential bandgap; offset cancellation; switched capacitor;

fLanguage

English

Publisher

ieee

Conference_Titel

Ph.D. Research in Microelectronics and Electronics (PRIME), 2014 10th Conference on

Conference_Location

Grenoble

Type

conf

DOI

10.1109/PRIME.2014.6872687

Filename

6872687