High-efficiency self-powered oscillator for capacitive neural stimulation

G. Hong, G. Han

Research output: Contribution to journalArticle

Abstract

Implantable neural stimulation devices have drawn attention for various clinical purposes. Capacitor-coupled stimulation inherently maintains charge-balance, allowing the use of less complex pulsegenerating circuits. This Letter proposes a self-powered relaxation oscillator, which allows direct charge transfer from the energy harvester to the capacitive stimulation electrode. As the proposed circuit does not require power supply to operate the oscillator itself, it achieves high power efficiency by eliminating wasted current from the power supply to the ground. A prototype of the proposed oscillator was fabricated with a 0.35 μm standard CMOS process. The prototype chip demonstrates power efficiency of up to 94.1% at 520 Hz for 1.4 V signal swing.

Original languageEnglish
Pages (from-to)268-270
Number of pages3
JournalElectronics Letters
Volume54
Issue number5
DOIs
Publication statusPublished - 2018 Mar 8

Fingerprint

Relaxation oscillators
Harvesters
Networks (circuits)
Charge transfer
Capacitors
Electrodes

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Cite this

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High-efficiency self-powered oscillator for capacitive neural stimulation. / Hong, G.; Han, G.

In: Electronics Letters, Vol. 54, No. 5, 08.03.2018, p. 268-270.

Research output: Contribution to journalArticle

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