Design of highly programmable bio-impedance measurement IC in 0.18μm CMOS

Author

Cho, Min-Chang ; Yoon, Young-Gyu ; Cho, SeongHwan

Author_Institution

Dept. of EECS, KAIST, Daejeon, South Korea

fYear

2009

Firstpage

79

Lastpage

82

Abstract

In this paper, a highly programmable bio-impedance measurement system for multi-purpose health monitoring application is presented. Complex and area consuming analog components are replaced by a high resolution ADC and digital processing providing lots of flexibility to both designers and users. The prototype of the proposed system architecture is designed in 0.18 μm CMOS technology. The tuning range of signal generator is from 10 kHz˜10 MHz and current variation of voltage-controlled current source (VCCS) is below 1%. The gain, bandwidth, CMRR and input referred noise of instrumentation amplifier (IA) are 18 dB, 1.5 Hz˜9.5 MHz, 96.7 dB at 100 kHz and 10.3 nV/??Hz, respectively. ADC is implemented using pseudo-differential VCO-based architecture. Signal-to-noise ratio (SNR), spurious-free dynamic range (SFDR) and signal-to-noise-and-distortion ratio (SNDR) of ADC are 87.5 dB, 60 dB and 60 dB, respectively. The total power consumption of prototype is 6.7 mW.

Keywords

CMOS digital integrated circuits; analogue-digital conversion; bioelectric phenomena; biomedical electronics; biomedical equipment; biomedical measurement; digital signal processing chips; instrumentation amplifiers; integrated circuit noise; noise generators; patient monitoring; programmable circuits; prototypes; CMOS technology; CMRR; SNR; bandwidth; digital processing; health monitoring; high resolution ADC; instrumentation amplifier noise; power 6.7 mW; power consumption; programmable bio-impedance measurement system; pseudodifferential VCO-based architecture; signal generator; signal-noise ratio; signal-noise-distortion ratio; size 0.18 μm; system architecture prototype; tuning range; voltage-controlled current source;

fLanguage

English

Publisher

ieee

Conference_Titel

SoC Design Conference (ISOCC), 2009 International

Conference_Location

Busan

Print_ISBN

978-1-4244-5034-3

Electronic_ISBN

978-1-4244-5035-0

Type

conf

DOI

10.1109/SOCDC.2009.5423876

Filename

5423876