A CMOS Current-Mode Magnetic Hall Sensor With Integrated Front-End

Author

Heidari, Hadi ; Bonizzoni, Edoardo ; Gatti, Umberto ; Maloberti, Franco

Author_Institution

Dept. of Electr., Comput. & Biomed. Eng., Univ. of Pavia, Pavia, Italy

Volume

62

Issue

5

fYear

2015

fDate

May-15

Firstpage

1270

Lastpage

1278

Abstract

A Hall magnetic sensor working in the current domain and its electronic interface are presented. The paper describes the physical sensor design and implementation in a standard CMOS technology, the transistor level design of its high sensitive front-end together with the sensor experimental characterization. The current-mode Hall sensor and the analog readout circuit have been fabricated using a 0.18- μm CMOS technology. The sensor uses the current spinning technique to compensate for the offset and provides a differential current as an output signal. The measured sensor power consumption and residual offset are 120 μW and 50 μT, respectively.

Keywords

CMOS integrated circuits; current-mode circuits; magnetic sensors; CMOS current-mode magnetic Hall sensor; analog readout circuit; current spinning technique; differential current; electronic interface; integrated front-end; physical sensor design; power 120 muW; residual offset; sensor experimental characterization; sensor power consumption; size 0.18 mum; transistor level design; CMOS integrated circuits; CMOS technology; Choppers (circuits); Current measurement; Noise; Sensitivity; Spinning; CMOS Hall sensors; current spinning; magnetic sensor;

fLanguage

English

Journal_Title

Circuits and Systems I: Regular Papers, IEEE Transactions on

Publisher

ieee

ISSN

1549-8328

Type

jour

DOI

10.1109/TCSI.2015.2415173

Filename

7097117