TY - GEN
T1 - A 1μW 85nV/√Hz pseudo open-loop preamplifier with programmable band-pass filter for neural interface system
AU - Chang, Sun Il
AU - Yoon, Euisik
PY - 2009
Y1 - 2009
N2 - We report an energy efficient pseudo open-loop amplifier with programmable band-pass filter developed for neural interface systems. The proposed amplifier consumes 400nA at 2.5V power supply. The measured thermal noise level is 85nV/√Hz and input-referred noise is 1.69 μ Vrms from 0.3Hz to 1 kHz. The amplifier has a noise efficiency factor of 2.43, the lowest in the differential topologies reported up to date to our knowledge. By programming the switched-capacitor frequency and bias current, we could control the bandwidth of the preamplifier from 138 mHz to 2.2 kHz to meet various application requirements. The entire preamplifier including band-pass filters has been realized in a small area of 0.043mm2 using a 0.25μm CMOS technology.
AB - We report an energy efficient pseudo open-loop amplifier with programmable band-pass filter developed for neural interface systems. The proposed amplifier consumes 400nA at 2.5V power supply. The measured thermal noise level is 85nV/√Hz and input-referred noise is 1.69 μ Vrms from 0.3Hz to 1 kHz. The amplifier has a noise efficiency factor of 2.43, the lowest in the differential topologies reported up to date to our knowledge. By programming the switched-capacitor frequency and bias current, we could control the bandwidth of the preamplifier from 138 mHz to 2.2 kHz to meet various application requirements. The entire preamplifier including band-pass filters has been realized in a small area of 0.043mm2 using a 0.25μm CMOS technology.
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U2 - 10.1109/IEMBS.2009.5334233
DO - 10.1109/IEMBS.2009.5334233
M3 - Conference contribution
C2 - 19964762
AN - SCOPUS:84903859726
SN - 9781424432967
T3 - Proceedings of the 31st Annual International Conference of the IEEE Engineering in Medicine and Biology Society: Engineering the Future of Biomedicine, EMBC 2009
SP - 1631
EP - 1634
BT - Proceedings of the 31st Annual International Conference of the IEEE Engineering in Medicine and Biology Society
T2 - 31st Annual International Conference of the IEEE Engineering in Medicine and Biology Society: Engineering the Future of Biomedicine, EMBC 2009
Y2 - 2 September 2009 through 6 September 2009
ER -