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Publication
A Sub-1 µA Low-Power, LowNoise Amplifier with Tunable Gain and Bandwidth for EMG and EOG Biopotential Signals
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Advisor(s)
Abstract(s)
This paper presents the design of a low-power
low-noise amplifier for biomedical and healthcare applications,
focusing on electromyography and electrooculography. The
signals operate in different broad bands, yet follow an
impulse-shape transmission, being suitable to be applied and
detected by the same receiver. The biopotential sensing
amplifiers usually have a major impact in power and noise
performance of an analog front end; hence, the development of
a low-noise amplifier with low-power consumption is of great
importance. In this paper, the state-of-the-art amplifiers for
biomedical applications are overviewed, and the proposed
solution is presented. The proposed design has tunable cutoff
frequency (FC) and gain, being adjustable for each type of
signal. The circuit is designed in UMC 130 nm CMOS
technology, supplied by 1.2 V, and consumes less than 1 μA.
Post-layout simulation results show that, at the high FC of 2
kHz, the gain is 34 dB, presenting an input-referred noise of
1.476 μVrms corresponding to a noise efficiency factor (NEF) of
1.27. Whereas at the low FC of 20.91 Hz, the gain is 52.35 dB,
the input-referred noise is 0.202 μVrms, and the NEF is 1.70.
Description
Keywords
Low-Power Low-Noise Biomedical Healthcare Biopotential Signals Energy-Efficiency Tunable CMOS
Citation
Vieira, R., Martins, R., Horta, N., Lourenco, N., & Povoa, R. (2021, July). A Sub-1muA Low-PowerLow-NoiseAmplifier with Tunable Gain and Bandwidth for EMG and EOG Biopotential Signals. In SMACD/PRIME 2021; International Conference on SMACD and 16th Conference on PRIME (pp. 356-359)
Publisher
VDE VERLAG GMBH