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. 2020 Aug 24;20(17):4775. doi: 10.3390/s20174775

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Part of the conditioning circuit of the EMGmeasurement circuit. (a) The band-pass filter. (b) The twin-T notch filter with adjustable quality factor (adapted from the datasheet of AD8244, in Figure 44, p. 17) [28]. (c) The second amplification stage with a changeable gain from 1 to 51; the gain value is set by R4.