Print Email Facebook Twitter A Low Power Time Domain ECG Interface Based on Flexible a-IGZO TFTs Title A Low Power Time Domain ECG Interface Based on Flexible a-IGZO TFTs Author Zulqarnain, M. Stanzione, S. van der Steen, J.L.P.J. Gelinck, G.H. Myny, K. Cantatore, E. Publication year 2019 Abstract This work presents a low power ECG interface for wearable applications, based on unipolar a-IGZO TFTs manufactured on a flexible substrate. The interface consists of a cascaded diode-connected load preamplifier followed by a reset integrator, which is used to convert the voltage signal to a pulse-width modulated (PWM) representation. The output is thus provided as a binary PWM waveform, which can be conveniently sent to a reader device using wireless communication and can be further converted to a digital representation using a simple counter. The flicker noise and the offset are eliminated using an approach similar to correlated double sampling. An input chopper is exploited to alternate the connection between the inputs of the preamplifier for each sample. The output signal is then extracted by subtracting two consecutive samples after conversion to the digital domain. In this way offset and low-frequency noise, which are correlated between the two samples, are effectively cancelled. Subject Industrial InnovationIGZOECGBio-signal read outVoltage to pulse width conversion To reference this document use: http://resolver.tudelft.nl/uuid:f28bc52c-6718-4980-8d30-502bf29c13c7 DOI https://doi.org/10.1109/iwasi.2019.8791321 TNO identifier 869350 Publisher Institute of Electrical and Electronics Engineers Inc. ISBN 9781728105574 Source Proceedings - 2019 8th International Workshop on Advances in Sensors and Interfaces, IWASI 2019, 8th International Workshop on Advances in Sensors and Interfaces, IWASI 2019, 13 June 2019 through 14 June 2019, 205-209 Article number 8791321 Document type conference paper Files To receive the publication files, please send an e-mail request to TNO Library.