Title :
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
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;
Conference_Titel :
Ph.D. Research in Microelectronics and Electronics (PRIME), 2010 Conference on
Conference_Location :
Berlin
Print_ISBN :
978-1-4244-7905-4
