A low-power noise scalable instrumentation amplifier for fetal monitoring applications

Author

Song, Seunghyun ; Rooijakkers, M.J. ; Rabotti, C. ; Mischi, Massimo ; van Roermund, Arthur H. M. ; Cantatore, Eugenio

Author_Institution

Dept. of Electr. Eng., Eindhoven Univ. of Technol., Eindhoven, Netherlands

fYear

2013

fDate

19-23 May 2013

Firstpage

1926

Lastpage

1929

Abstract

This paper proposes a low-power noise scalable instrumentation amplifier (IA) for fetal monitoring applications. The noise specification of the IA is made adaptive to the peak-peak value of the fetal electrocardiography (fECG) signal, which varies for different gestational age and measurement settings. Contrary to the currently available point solution IAs, the proposed IA is scalable for a noise range from 30nV/VHz to 250nV/VHz while consuming 15μW to 1μW respectively. A new IA architecture is proposed to achieve a better noise efficiency factor (NEF), while allowing noise scalability. The IA is designed in TSMC 0.18μm CMOS process. Simulation results show that the IA achieves a NEF of 3.4 to 5.5 over the noise scalable range, a CMRR of 100dB, and an input impedance (Z_in) of 1GO.

Keywords

CMOS digital integrated circuits; biomedical electronics; electric impedance; electrocardiography; low noise amplifiers; low-power electronics; TSMC CMOS process; fetal electrocardiography signal; fetal monitoring application; gestational age; input impedance; instrumentation amplifier; low-power noise scalable IA; measurement setting; noise efficiency factor; noise scalability; noise specification; power 15 muW to 1 muW; size 0.18 mum; Electrodes; Monitoring; Noise level; Servomotors; Signal to noise ratio; Topology;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (ISCAS), 2013 IEEE International Symposium on

Conference_Location

Beijing

ISSN

0271-4302

Print_ISBN

978-1-4673-5760-9

Type

conf

DOI

10.1109/ISCAS.2013.6572244

Filename

6572244