TY - GEN
T1 - A low-noise integrated bioamplifier with active DC offset suppression
AU - Zhao, Wei
AU - Li, Hongge
AU - Zhang, Youguang
PY - 2009
Y1 - 2009
N2 - This paper describes a novel low-power, low-noise amplifier for neural recording applications. The bioamplifier achieves the best power-size tradeoff compared to the previous design. By means of a new active feedback configuration, the DC offset is rejected without the large capacitors. An active differentiator with an amplifier in the feedback path places a high-pass cutting frequency in the transfer function. The midband gain consists of the passive components, and is insensitive to the mismatch of process. The bioamplifier has been implemented in the Chartered 0.35- μm 2P4M CMOS process and occupies 0.022mm2 of chip area. The current consumption of amplifier is 2μA at ±1.5V supply. The bioamplifier achieves a midband gain of 46dB and a -3dB bandwidth from 13Hz to 8.9kHz. The input-referred noise is 5.7μVrms corresponding to an NEF of 3.1.
AB - This paper describes a novel low-power, low-noise amplifier for neural recording applications. The bioamplifier achieves the best power-size tradeoff compared to the previous design. By means of a new active feedback configuration, the DC offset is rejected without the large capacitors. An active differentiator with an amplifier in the feedback path places a high-pass cutting frequency in the transfer function. The midband gain consists of the passive components, and is insensitive to the mismatch of process. The bioamplifier has been implemented in the Chartered 0.35- μm 2P4M CMOS process and occupies 0.022mm2 of chip area. The current consumption of amplifier is 2μA at ±1.5V supply. The bioamplifier achieves a midband gain of 46dB and a -3dB bandwidth from 13Hz to 8.9kHz. The input-referred noise is 5.7μVrms corresponding to an NEF of 3.1.
UR - https://www.scopus.com/pages/publications/77749308483
U2 - 10.1109/BIOCAS.2009.5372099
DO - 10.1109/BIOCAS.2009.5372099
M3 - 会议稿件
AN - SCOPUS:77749308483
SN - 9781424449187
T3 - 2009 IEEE Biomedical Circuits and Systems Conference, BioCAS 2009
SP - 5
EP - 8
BT - 2009 IEEE Biomedical Circuits and Systems Conference, BioCAS 2009
T2 - 2009 IEEE Biomedical Circuits and Systems Conference, BioCAS 2009
Y2 - 26 November 2009 through 28 November 2009
ER -