A 20uW Intra-Cardiac Signal-Processing IC with 82db Bio-Impedance Measurement Dynamic Range and Analog Feature Extraction for Ventricular Fibrillation

Sunyoung, K., Long, Y., Mitra, S., Osawa, M., Harada, Y., Tamiya, K., van Hoof, C. and Yazicioglu, R.F. (2013) A 20uW Intra-Cardiac Signal-Processing IC with 82db Bio-Impedance Measurement Dynamic Range and Analog Feature Extraction for Ventricular Fibrillation. In: 2013 IEEE International Solid-State Circuits Conference Digest of Technical Papers (ISSCC), San Francisco, CA, USA, 17-21 Feb 2013, pp. 302-303. ISBN 9781467345156 (doi: 10.1109/ISSCC.2013.6487745)

Abstract

The accurate recognition of multiple intra-cardiac signals is becoming more and more important for Cardiac Resynchronization Therapy (CRT) and for the analysis of the intra-thoracic fluid status [1, 2]. Robust and accurate Heart-Rate (HR) monitoring at the right/left ventricles and the right atrium is essential for an implantable cardiac pacemaker system (Fig. 16.9.1), and ultra-low power consumption is needed. In addition, an accurate motion sensor and thoracic impedance measurement can acquire valuable additional information in clinical research on the intra-cardiac rhythm analysis. As shown in Fig. 16.9.2, our proposed Analog Signal Processor (ASP) IC consists of 3 power-efficient intra-cardiac signal readout channels. Each channel is equipped with a low-power QRS feature extraction unit and an ECG processor in parallel. The ASP also provides an ultra-low-power readout circuit for an external accelerometer (RA). In addition, two quadrature bio-impedance readout channels are used together with a digitized sinusoidal current generator in order to implement an accurate and wide dynamic range bio-impedance measurement. The ASP improves the state of the art by integrating a power-efficient means of QRS feature extraction for detecting Ventricular Fibrillation (VF), and a wide dynamic range bio-impedance readout.

• Item Type: Conference Proceedings
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Mitra, Dr Srinjoy
• Authors: Sunyoung, K., Long, Y., Mitra, S., Osawa, M., Harada, Y., Tamiya, K., van Hoof, C., and Yazicioglu, R.F.
• College/School: College of Science and Engineering > School of Engineering
• ISBN: 9781467345156