Original scientific paper

https://doi.org/10.17559/TV-20150710101906

A novel fully fast recovery EMG amplifier for the control of neural prosthesis

Vojin Ilić orcid.org/0000-0002-4528-8832 ; Faculty of Technical Sciences, Trg Dositeja Obradovića 6, 21000 Novi Sad, Serbia
Nikola Jorgovanović ; Faculty of Technical Sciences, Trg Dositeja Obradovića 6, 21000 Novi Sad, Serbia
Aco Antić orcid.org/0000-0002-8520-762X ; Faculty of Technical Sciences, Trg Dositeja Obradovića 6, 21000 Novi Sad, Serbia
Slobodan Morača orcid.org/0000-0001-6174-1038 ; Faculty of Technical Sciences, Trg Dositeja Obradovića 6, 21000 Novi Sad, Serbia
Nikolae Ungureanu orcid.org/0000-0003-1320-6473 ; Technical University of Cluj-Napoca, Dr. V. Babes 62/A, 430083 Baia Mare, Romania

Abstract

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.

Keywords

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

Hrčak ID:

163761

URI

https://hrcak.srce.hr/163761

Publication date:

16.8.2016.

Article data in other languages: croatian

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