TY - JOUR
T1 - Improvement of signal-to-interference ratio and signal-to-noise ratio in nerve cuff electrode systems
AU - Chu, Jun Uk
AU - Song, Kang Il
AU - Han, Sungmin
AU - Lee, Soo Hyun
AU - Kim, Jinseok
AU - Kang, Ji Yoon
AU - Hwang, Dosik
AU - Suh, Jun Kyo Francis
AU - Choi, Kuiwon
AU - Youn, Inchan
PY - 2012/6
Y1 - 2012/6
N2 - Cuff electrodes are effective for chronic electroneurogram (ENG) recording while minimizing nerve damage. However, the ENG signals are usually contaminated by electromyogram (EMG) activity from the surrounding muscles, stimulus artifacts produced by the electrical stimulation and noise generated in the first stage of the neural signal amplifier. This paper proposed a new cuff electrode to reduce the interference from EMG signals and stimulus artifacts. As a result, when an additional middle electrode was placed at the center of the cuff electrode, a significant improvement in the signal-to-interference ratio was achieved at 11% for the EMG signals and 12% for the stimulus artifacts when compared to a conventional tripolar cuff. Furthermore, a new low-noise amplifier was proposed to improve the signal-to-noise ratio. The circuit was designed based on a noise analysis to minimize the noise, and the results show that the total noise of the amplifier was below 1μV for a cuff impedance of 1 kΩ and a frequency bandwidth of 300 to 5000 Hz.
AB - Cuff electrodes are effective for chronic electroneurogram (ENG) recording while minimizing nerve damage. However, the ENG signals are usually contaminated by electromyogram (EMG) activity from the surrounding muscles, stimulus artifacts produced by the electrical stimulation and noise generated in the first stage of the neural signal amplifier. This paper proposed a new cuff electrode to reduce the interference from EMG signals and stimulus artifacts. As a result, when an additional middle electrode was placed at the center of the cuff electrode, a significant improvement in the signal-to-interference ratio was achieved at 11% for the EMG signals and 12% for the stimulus artifacts when compared to a conventional tripolar cuff. Furthermore, a new low-noise amplifier was proposed to improve the signal-to-noise ratio. The circuit was designed based on a noise analysis to minimize the noise, and the results show that the total noise of the amplifier was below 1μV for a cuff impedance of 1 kΩ and a frequency bandwidth of 300 to 5000 Hz.
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U2 - 10.1088/0967-3334/33/6/943
DO - 10.1088/0967-3334/33/6/943
M3 - Article
C2 - 22551721
AN - SCOPUS:84861148659
SN - 0967-3334
VL - 33
SP - 943
EP - 967
JO - Clinical Physics and Physiological Measurement
JF - Clinical Physics and Physiological Measurement
IS - 6
ER -