eprintid: 10195849
rev_number: 6
eprint_status: archive
userid: 699
dir: disk0/10/19/58/49
datestamp: 2024-08-16 06:10:41
lastmod: 2024-08-16 06:10:41
status_changed: 2024-08-16 06:10:41
type: proceedings_section
metadata_visibility: show
sword_depositor: 699
creators_name: Wu, Z
creators_name: Wu, Y
creators_name: Demosthenous, A
title: A 199 μW, 82.9% Efficiency Current Driver with Active Common-Mode Reduction for Impedance-Based Tactile Sensors
ispublished: pub
divisions: UCL
divisions: B04
divisions: F46
keywords: Power demand, Power measurement, Impedance measurement,
Hydrogels, Current measurement, Simulation, Tactile sensors
note: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
abstract: This paper presents a differential current driver based on a current feedback structure, designed to drive hydrogel sensors. It achieves low power consumption, low common-mode signal on the load, and high current efficiency. The use of a negative unit gain buffer reduces the common-mode signal on the load arising from process variations. The current driver was designed in a 65-nm CMOS technology with a 3.3 V supply. Simulation results demonstrate a THD of 0.4% at 125 kHz, for 40 μAp-p output current. The common-mode voltage on the load is reduced by 98.96% compared to a conventional topology using two independent drivers. The total current consumption is 60.3 μA, resulting in a current efficiency of 82.9%. The simulated output impedance is 2.76 MΩ at 125 kHz and 1.47 MΩ at 300 kHz.
date: 2024-07-02
date_type: published
publisher: IEEE
official_url: http://dx.doi.org/10.1109/iscas58744.2024.10558093
oa_status: green
full_text_type: other
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 2302028
doi: 10.1109/ISCAS58744.2024.10558093
lyricists_name: Demosthenous, Andreas
lyricists_name: Wu, Zhentao
lyricists_id: ACDEM08
lyricists_id: ZWUEX92
actors_name: Wu, Zhentao
actors_id: ZWUEX92
actors_role: owner
full_text_status: public
pres_type: paper
publication: Proceedings - IEEE International Symposium on Circuits and Systems
place_of_pub: Singapore, Singapore
event_title: 2024 IEEE International Symposium on Circuits and Systems (ISCAS)
event_dates: 19 May 2024 - 22 May 2024
issn: 0271-4310
book_title: 2024 IEEE International Symposium on Circuits and Systems (ISCAS)
citation:        Wu, Z;    Wu, Y;    Demosthenous, A;      (2024)    A 199 μW, 82.9% Efficiency Current Driver with Active Common-Mode Reduction for Impedance-Based Tactile Sensors.                     In:  2024 IEEE International Symposium on Circuits and Systems (ISCAS).    IEEE: Singapore, Singapore.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10195849/1/2024018836.pdf