Output stage of a current-steering multipolar and multisite deep brain stimulator

Virgilio Valente, Andreas Demosthenous, Richard Bayford

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

5 Citations (Scopus)

Abstract

Clinical deep brain stimulation (DBS) is based on the use of cylindrical electrodes driven in monopolar or bipolar configurations. The simulation field spreads symmetrically around the electrode modulating both targeted and non-targeted neural structures. Recent advances have focused on novel stimulation techniques based on the use of high-density segmented electrodes, which allow current-steering and field-shaping capability. This paper presents the architecture of a multi-channel current-steering stimulator output stage that allows for monopolar, bipolar, tripolar and quadripolar multi-site stimulation. The core of the output stage comprises N independent high-compliance current drivers (HCCDs), capable of delivering up to 1.5 mA complementary currents in 10 different current ranges. Each of the N HCCDs can drive up to 8 adjacent electrode contacts thanks to a 2-32 multiplexer controlled by a 5-32 decoder. The HCCD was designed in a HV 0.18μm CMOS process. The circuits were simulated in Cadence Spectre and simulated results are presented in the paper.

Original languageEnglish
Title of host publication2013 IEEE Biomedical Circuits and Systems Conference, BioCAS 2013
Pages85-88
Number of pages4
DOIs
Publication statusPublished - 1 Dec 2013
Externally publishedYes
Event2013 IEEE Biomedical Circuits and Systems Conference, BioCAS 2013 - Rotterdam, Netherlands
Duration: 31 Oct 20132 Nov 2013

Publication series

Name2013 IEEE Biomedical Circuits and Systems Conference, BioCAS 2013

Conference

Conference2013 IEEE Biomedical Circuits and Systems Conference, BioCAS 2013
CountryNetherlands
CityRotterdam
Period31/10/132/11/13

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