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A CMOS analog front-end IC for portable EEG/ECG monitoring applications

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2 Author(s)
Ng, K.A. ; Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore ; Chan, P.K.

A new digital programmable CMOS analog front-end (AFE) IC for measuring electroencephalograph or electrocardiogram signals in a portable instrumentation design approach is presented. This includes a new high-performance rail-to-rail instrumentation amplifier (IA) dedicated to the low-power AFE IC. The measurement results have shown that the proposed biomedical AFE IC, with a die size of 4.81 mm2, achieves a maximum stable ac gain of 10 000 V/V, input-referred noise of 0.86 μ Vrms (0.3 Hz-150 Hz), common-mode rejection ratio of at least 115 dB (0-1 kHz), input-referred dc offset of less than 60 μV, input common mode range from -1.5 V to 1.3 V, and current drain of 485 μA (excluding the power dissipation of external clock oscillator) at a ±1.5-V supply using a standard 0.5-μm CMOS process technology.

Published in:

Circuits and Systems I: Regular Papers, IEEE Transactions on  (Volume:52 ,  Issue: 11 )

Date of Publication:

Nov. 2005

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