Optimized low-power CMOS active-electrode-pair for low-frequency multi-channel biomedical stimulation. (August 2017)

• Record Type: Journal Article
• Authors: Al-Darkazly, Ibtisam A. Abbas; Hasan, S.M. Rezaul
• Is Part Of: Microelectronics journal. Volume 66(2017)
• Page Start: 18
• Page End: 24
• Publication Date: 2017-08
• Subjects: Active-electrode (AE) -- Adaptive technique -- CMOS buffer circuit -- Voltage follower amplifier; Microelectronics -- Periodicals; Microélectronique -- Périodiques; Microelectronics; Electronic journals; Journals - contents and abstracts; Periodicals; 621.3805
• DOI: 10.1016/j.mejo.2017.05.014
• Languages: English
• ISSNs: 0959-8324

Abstract

Abstract: A novel CMOS active electrode-pair for electro-bio- stimulation with high signal integrity is being reported in this paper. The active electrode employs a buffer circuit based on an adaptive voltage follower to increase the output current in an efficient way, while minimizing the overall power consumption. The active electrode-pair circuit was fabricated in a 130 nm CMOS process using a low supply-voltage of +1.2 V, consuming only 100.8 µW. It occupies a small chip-area of around 2936.23 µm 2 (2 × 1468.12 µm 2 ). It can deliver bi-phase square waveform signals from 16 selectable low-frequency channels. The individual active electrode can also be used to deliver mono-phase square waveform output signals. Being a miniature bioelectronic component, it is suitable both as an implantable and as non-invasive biomedical stimulation device.