CUED Publications database

Neuromodulation of Neuromorphic Circuits

Ribar, L and Sepulchre, R (2019) Neuromodulation of Neuromorphic Circuits. IEEE Transactions on Circuits and Systems I: Regular Papers, 66. pp. 3028-3040. ISSN 1549-8328 (Unpublished)

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Abstract

We present a novel methodology to enable control of a neuromorphic circuit in close analogy with the physiological neuromodulation of a single neuron. The methodology is general in that it only relies on a parallel interconnection of elementary voltage-controlled current sources. In contrast to controlling a nonlinear circuit through the parameter tuning of a state-space model, our approach is purely input-output. The circuit elements are controlled and interconnected to shape the current-voltage characteristics (I-V curves) of the circuit in prescribed timescales. In turn, shaping those I-V curves determines the excitability properties of the circuit. We show that this methodology enables both robust and accurate control of the circuit behavior and resembles the biophysical mechanisms of neuromodulation. As a proof of concept, we simulate a SPICE model composed of MOSFET transconductance amplifiers operating in the weak inversion regime.

Item Type: Article
Uncontrolled Keywords: q-bio.NC q-bio.NC
Subjects: UNSPECIFIED
Divisions: Div F > Control
Depositing User: Cron Job
Date Deposited: 01 Apr 2019 20:08
Last Modified: 10 Dec 2019 02:04
DOI: 10.1109/TCSI.2019.2907113