SHERP

Noise Performance Design of CMOS Preamplifier for the Active Semiconductor Neural Probe

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Authors
Kim, Kyung Hwan; Kim, Sung June
Issue Date
2000-08
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Citation
IEEE Trans. Biomed. Eng., vol. 47, pp. 1097-1105, Aug. 2000
Keywords
Active neural probeCMOSdifferential amplifierextracellular recordingsignal-to-noise ratio
Abstract
A systematic design guideline is presented for the
noise performance of preamplifier for semiconductor neural
probe which contains on-chip electronic circuitry. The overall
signal-to-noise ratio (SNR) is calculated considering the spectral
characteristics of the measured extracellular action potential
and the low-frequency noise spectrum of the CMOS device from
typical fabrication processes. An analytical expression of the
output noise power is derived, and utilized to tailor the frequency
response and device parameters which are controllable by the circuit
designer. An analysis of the output SNR of a two-stage CMOS
differential amplifier is given and the major factors which have
significant effects on the SNR are determined. We showed that a
little deviation of the input device sizes and transconductance ratio
from the optimal values can significantly deteriorate the SNR.
Quantitative information of the preamplifier circuit parameters
for satisfactory noise performance is provided.
ISSN
0018-9294
Language
English
URI
http://hdl.handle.net/10371/8866
DOI
https://doi.org/10.1109/10.855938
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Electrical and Computer Engineering (전기·정보공학부)Journal Papers (저널논문_전기·정보공학부)
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