Searched for: author:"Xu, J."
(1 - 3 of 3)
Xu, J. (author), Mitra, Srinjoy (author), Van Hoof, Chris (author), Yazicioglu, Refet Firat (author), Makinwa, K.A.A. (author)
Active electrodes (AEs), i.e., electrodes with built-in readout circuitry, are increasingly being implemented in wearable healthcare and lifestyle applications due to AEs' robustness to environmental interference. An AE locally amplifies and buffers μV-level EEG signals before driving any cabling. The low output impedance of an AE mitigates...
journal article 2017
Xu, J. (author), Büsze, Benjamin (author), Van Hoof, Chris (author), Makinwa, K.A.A. (author), Yazicioglu, Refet Firat (author)
This paper presents a digital active electrode (DAE) system for multi-parameter biopotential signal acquisition in portable and wearable devices. It is built around an IC that performs analog signal processing and digitization with the help
of on-chip instrumentation amplifiers, a 12 bit ADC and a digital interface. Via a standard bus, up to...
journal article 2015
Xu, J. (author), Yazicioglu, Refet Firat (author), Grundlehner, Bernard (author), Harpe, Pieter (author), Makinwa, K.A.A. (author), Van Hoof, Chris (author)
This paper presents an active electrode system for gel-free biopotential EEG signal acquisition. The system consists of front-end chopper amplifiers and a back-end common-mode feedback (CMFB) circuit. The front-end AC-coupled chopper amplifier employs input impedance boosting and digitally-assisted
offset trimming. The former increases the...
journal article 2011