A New Configuration of Multipolar Cuff Electrode and Dedicated IC for Afferent Signal Recording

Serge Bernard (1) , Yves Bertrand (1) , Guy Cathébras (2) , Lionel Gouyet (2) , David Guiraud (3, 2)

1 SysMIC - Conception et Test de Systèmes MICroélectroniques
2 DEMAR - Artificial movement and gait restoration
3 LIRMM - Laboratoire d'Informatique de Robotique et de Microélectronique de Montpellier

Sensory information coming from natural sensors and being propagated on afferent nerve fibers could be used as feedback for a more efficient closed-loop control of a Functional Electrical Stimulation system. In order to extract and separate these signals according to their nerve fascicule origins, we propose a new architecture of a multipolar cuff electrode and an optimized integrated acquisition circuit. Concerning the electrode, we propose a specific configuration using a large number of poles in order to both reject parasitic signals, such as electromyogram and provide a maximum of recording channels in order to help the signal localization inside the nerve. Moreover, specific low-level analog signal processing was designed to extract the expected low-amplitude signal from its noisy environment. This signal processing is implemented in an ASIC that has to be implanted close to the electrode to achieve the best signal-to-noise ratio.

Domaines: Micro et nanotechnologies/Microélectronique

Serge Bernard, Yves Bertrand, Guy Cathébras, Lionel Gouyet, David Guiraud. A New Configuration of Multipolar Cuff Electrode and Dedicated IC for Afferent Signal Recording. 3rd International IEEE/EMBS Conference on Neural Engineering, Hawai, United States. pp.578-581. ⟨lirmm-00195236⟩