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Technical gazette, Vol.23 No.4 August 2016. -

This paper presents a novel EMG electromyography fast recovery amplifier, which can be used as a neural prosthesis control interface. The basis of the proposed circuit is standard three op-amp amplifier with integrator in the negative feed-back loop of the differential amplifier. The Standard three op-amp instrumentation amplifier has been modified by introducing analog delay line between the first stage differential input - differential output amplifier and the second stage differential amplifier. The main purpose of the analog delay line is to delay EMG signal and the stimulus artifact between the first and the second stage. It is shown that by introducing a delay line in the standard three op-amp instrumentation amplifier, stimulus artifact can be detected before it appears at the output of the amplifier. Thus the control circuits of the amplifier have enough time to disable the integrator in the differential amplifier, and prevent charge accumulation in the integrators capacitor. It is also shown that this configuration of the EMG amplifier has ultrafast recovery time, so it can be used as a control interface of the neural prosthesis.

analog delay line; EMG Amplifier; instrumentation amplifier; neural prosthesis



Author: Vojin Ilić - orcid.org-0000-0002-4528-8832 ; Faculty of Technical Sciences, Trg Dositeja Obradovića 6, 21000 Novi Sad, Serbia N

Source: http://hrcak.srce.hr/



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