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An EMG Readout Front-End with Automatic Gain Controller for Human-Computer Interface

Title
An EMG Readout Front-End with Automatic Gain Controller for Human-Computer Interface
Author
권오경
Keywords
Components; Circuits; Devices and Systems; Electromyography; Gain; Automatic generation control; Capacitors; Human computer interaction; Gain control; Envelope detectors
Issue Date
2013-10
Publisher
IEEE
Citation
Biomedical Circuits and Systems Conference (BioCAS), 2013, P.170-173
Abstract
We propose an electromyogram (EMG) readout front-end with an automatic gain controller (AGC) for a human-computer interface (HCI). The proposed AGC adaptively controls voltage gain depending on the amplitude of the extracted EMG signal, which is varied according to the number of muscle fibers and the surface condition of the skin. Furthermore, the AGC alleviates the resolution requirement of an analog-digital converter (ADC) by fitting the maximum amplitude of the EMG signal to the full input range of the ADC. In order to obtain the wide-gain range, two variable gain amplifiers (VGAs) are used in the AGC. The voltage gain of the AGC is adjusted from 0 to 48.2 dB. A digital gain controller is employed to reduce the power consumption of the AGC. The calculated power efficiency of the AGC is 6.51 dB/μW. The proposed readout front-end is fabricated by using a 0.18 μm CMOS process technology and dissipates 19 μW at the supply voltage of 1.5 V.
URI
http://ieeexplore.ieee.org/abstract/document/6679666/http://hdl.handle.net/20.500.11754/53382
ISBN
978-1-4799-1471-5; 978-1-4799-1469-2
ISSN
2163-4025
DOI
10.1109/BioCAS.2013.6679666
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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