A 1-MHz analog front-end for a wireless bioelectrical impedance sensor

Author

Ramos, Javier ; Ausín, José L. ; Torelli, Guido

Author_Institution

Dept. of Electr. & Electron. Eng., Univ. of Extremadura, Badajoz, Spain

fYear

2010

fDate

18-21 July 2010

Firstpage

1

Lastpage

4

Abstract

An application-specific integrated circuit that implements the analog front-end (AFE) for the sensing section of a wireless bioelectrical impedance sensor is presented. The measurement principle is based on the magnitude-ratio and phase-difference detection method, which reduces circuit realization complexity as compared to conventional techniques. The AFE includes an instrumentation amplifier and a gain-phase detector, and is designed to operate with 3 V of supply voltage over an input signal frequency range from 1 kHz to 1 MHz. A test chip was fabricated in 0.35-μm CMOS technology. Preliminary experimental results of the AFE are reported.

Keywords

CMOS analogue integrated circuits; application specific integrated circuits; bioelectric potentials; instrumentation amplifiers; wireless sensor networks; CMOS technology; analog front-end; application-specific integrated circuit; gain-phase detector; instrumentation amplifier; wireless bioelectrical impedance sensor; Biomedical measurements; Bismuth; Frequency measurement; Impedance; Impedance measurement; Wireless communication; Wireless sensor networks; CMOS analog integrated circuits; bioelectrical impedance spectroscopy; wireless sensor network;

fLanguage

English

Publisher

ieee

Conference_Titel

Ph.D. Research in Microelectronics and Electronics (PRIME), 2010 Conference on

Conference_Location

Berlin

Print_ISBN

978-1-4244-7905-4

Type

conf

Filename

5587109