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ASICs of the EMG Sensor with High Gain and Low Noise
Sunwoo Yuk(육선우),In Ho Hwang(황인호),Mu Seung Mun(문무성) 대한전자공학회 2010 대한전자공학회 학술대회 Vol.2010 No.6
This paper proposed a compact-sized EMG sensor with high gain and low noise. The sensor was composed of a skin interface and circuits mounted on a single package. Moreover, it has multi-stage gain amplifier and a few analog filters. The main performances of this sensor are the following : the gain is adjustable from 2,000 to 100,000 folds by external digital logic, the dominant frequency is 90~330Hz with 60Hz-rejection frequency, CMRR and phase margins is above 100dB and 75°, respectively. The design was simulated in standard 0.25um CMOS technology.
인공의족의 외반 특성이 하퇴절단자의 무릎과 발목에 미치는 영향
배태수(Tae Soo Bae),장윤희(Yun Hee Chang),김신기(Shin Ki Kim),문무성(Mu Seung Mun) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
One of the important functions of prosthetic foot is the foot inversion-eversion which is so important when walking on uneven surfaces. The aim of our study was to evaluate the effect of foot eversion angle especially on knee and ankle joint for transtibial amputees by motion analysis. The experimental data were collected from three transtibial amputees and then ten healthy individuals. To simulate walking on side sloping ground, we used custom-made slope (5, 10, 15 degrees). Motion analysis was performed by 3-dimensional motion analyzer for 6 dynamic prosthetic feet. The results showed that knee abduction moments of amputated leg were decreased but those of sound leg were mainly increased as foot eversion angle increased. And ankle abduction moments of sound leg were inconsistent in magnitude and tendency between control and experimental group. Therefore foot eversioncharacteristics should be considered to develop advanced prosthetic foot.
인공의족의 외반 특성이 하퇴절단자의 무릎과 발목에 미치는 영향
배태수(Tae Soo Bae),장윤희(Yun Hee Chang),김신기(Shin Ki Kim),문무성(Mu Seung Mun) 대한기계학회 2009 大韓機械學會論文集A Vol.33 No.9
One of the important functions of prosthetic foot is the foot inversion-eversion which is so important when walking on uneven surfaces. The aim of our study was to evaluate the effect of foot eversion angle especially on knee and ankle joint for transtibial amputees by motion analysis. The experimental data were collected from three transtibial amputees and then ten healthy individuals. To simulate walking on side sloping ground, we used custom-made slope (5, 10, 15 degrees). Motion analysis was performed by 3-dimensional motion analyzer for 6 dynamic prosthetic feet. The results showed that knee abduction moments of amputated leg were decreased but those of sound leg were mainly increased as foot eversion angle increased. And ankle abduction moments of sound leg were inconsistent in magnitude and tendency between control and experimental group. Therefore foot eversioncharacteristics should be considered to develop advanced prosthetic foot.