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Author Seunghyun Lim ♦ Changho Seok ♦ Hyunho Kim ♦ Haryong Song ♦ Hyoungho Ko
Sponsorship IEEE Electron Dev. Soc.
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©2014
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics ♦ Electricity & electronics ♦ Technology ♦ Engineering & allied operations ♦ Applied physics
Subject Keyword Impedance ♦ Frequency measurement ♦ Capacitors ♦ Noise ♦ Electroencephalography ♦ Boosting ♦ Integrated circuits ♦ capacitive input impedance boosting loop (CIIBL) ♦ Electroencephalogram (EEG) ♦ analog front-end (AFE)
Abstract This paper presents a biopotential analog front-end (AFE) IC for measuring electroencephalogram (EEG). The AFE is based on the AC-coupled chopper stabilized instrumentation amplifier architecture to achieve the low noise. To increase the input impedance, the capacitive input impedance boosting loop (CIIBL) is proposed. The CIIBL forms a positive feedback loop between input and output of the instrumentation amplifier without additional power consumption. The CIIBL increases the input impedance from 644 MΩ to 3.5 GΩ, and enhances the CMRR from 133.4 dB to 139.1 dB, in simulation. The overall gain, the frequency response, and the input mismatches can be trimmed using programmable capacitors and programmable resistors. The AFE is fabricated in 0.18 μm 1P6M CMOS process. The core chip size of the AFE without I/O pads is 4000 by 4500 $μm^{2}.$ The input referred noise is measured to be 0.205 $μV_{rms}$ in the bandwidth from 0.5 Hz to 100 Hz. The amplifying gain of the pass band is measured to be 78 dB.
Description Author affiliation: Dept. of Electron., Chungnam Nat. Univ., Daejeon, South Korea (Seunghyun Lim; Changho Seok; Hyunho Kim; Haryong Song; Hyoungho Ko)
ISBN 9781479932863
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2014-09-15
Publisher Place USA
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Size (in Bytes) 886.75 kB
Page Count 4
Starting Page 1
Ending Page 4

Source: IEEE Xplore Digital Library