Publications by Catherine Dehollain

An Ultra Low Power Analog/Mixed-Signal Processor for a Smart RF Signal Classification System in the ISM Band

In this work, we propose an ultra-low power highly configurable analog/mixed-signal (AMS) processor as part of a smart RF signal detection and recognition system focusing on the ISM band. The analog feature extraction approach reduces power consumption and ...

IEEE2025

An Analysis of an ASK Demodulator With Dual Self-Biased Separated Voltages for Implantable Applications

Catherine Dehollain, Alexandre Schmid

A new structure of low-power demodulator named 'separated-Vb' amplitude shift keying (ASK) demodulator is proposed. The circuit is based on the switching behavior of the core digital shaper with different bias voltages, which improves its operation at low ...

2024

A Wireless Power Conversion Chain With Fully On-Chip Automatic Resonance Tuning System for Biomedical Implants

Catherine Dehollain, Alexandre Schmid

This paper presents a wireless power conversion system designed for biomedical implants, with integrated automatic resonance tuning. The automatic tuning mechanism improves power transfer efficiency (PTE) by finely tuning the resonant frequency of the powe ...

Ieee-Inst Electrical Electronics Engineers Inc2024

A High Dynamic Range Envelop Detector for Heterodyne Receiver Architecture

Catherine Dehollain, Andreas Peter Burg

Energy detection (ED) has been of interest for various applications ranging from very low frequency biomedical signal read-out to high frequency wireless communication. The analog implementation of the ED requires circuits with a non-linear transfer charac ...

Ieee-Inst Electrical Electronics Engineers Inc2024

An offset-enhanced active rectifier with delay compensated active diodes for wirelessly powered biomedical implants

Catherine Dehollain, Alexandre Schmid

This letter presents the design of a 13.56 MHz offset-enhanced full-wave active rectifier, tailored for wirelessly powered biomedical implants. The design incorporates digitally assisted, delay-compensated active diodes and symmetrical bulk biasing in the ...

2024

High-Efficiency Reconfigurable CMOS RF-to-DC Converter System for Ultra-Low-Power Wireless Sensor Nodes with Efficient MPPT Circuitry

Catherine Dehollain, Sandro Carrara, Roberto La Rosa

This paper presents a novel CMOS RF-to-DC converter for ultra-low-power wireless sensor nodes powered by RF wireless power transfer. The proposed converter achieves 10% higher power conversion efficiency than a conventional rectifier, with only a 1% increa ...

2024

An area efficient inductorless super-regenerative receiver front-end for biomedical implant devices

Catherine Dehollain, Naci Pekçokgüler

Wearable and implantable medical devices are of great importance in diagnosis and treatment as they provide continuous monitoring and data collection. Considering the comfort of the patient and ease-of-operation, these devices require wireless data transmi ...

Elsevier Gmbh2024

Wireless Power and Data Transceiver in A Central Implanted Unit for Biomedical Applications

Catherine Dehollain, Alexandre Schmid

This paper presents a wireless power and data transmitter designed for central implanted units (CIUs) in the context of biomedical applications. This CIU is positioned within the human body or brain to supply power from stored battery energy to specific im ...

Institute of Electrical and Electronics Engineers Inc.2024

Analytical Modeling of Short-Channel MOSFET Differential Pair Non-Linearity

Christian Enz, Catherine Dehollain, Andreas Peter Burg, Hung-Chi Han

Energy efficiency is of utmost importance in modern applications. Power consumption optimisation could be improved by a comprehensive analytical modeling of the characteristics of critical blocks in a system. Dynamic range (DR) has a strong effect on the p ...

2024

Wirelessly Powered and Bi-Directional Data Communication System With Adaptive Conversion Chain for Multisite Biomedical Implants Over Single Inductive Link

Catherine Dehollain, Alexandre Schmid

A wirelessly powered and data communication system is presented which is implemented as a full system, designed for multisite implanted biomedical applications. The system is capable of receiving wireless power and data communication for each implant separ ...

2024

Power Feedback Control Unit for Closed-Loop Wirelessly Powered Biomedical Implants

Catherine Dehollain, Alexandre Schmid

Effective power management is crucial in designing wirelessly powered implants that have a long operational lifetime. It ensures that the received power is optimized for efficient operation and prevents damage caused by excessive or insufficient powering. ...

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2023

An Implantable Wireless System for Remote Hemodynamic Monitoring of Heart Failure Patients

Marco Mattavelli, Catherine Dehollain, Diego Ruben Barrettino, Kerim Türe, Mustafa Besirli

This article presents an implantable wireless system for remote hemodynamic monitoring, which enables direct, continuous (24/7), and simultaneous measurement of pulmonary arterial pressure (PAP) and cross-sectional area (CSA) of the artery. The implantable ...

2023

A 13.56MHz Active Rectifier with Digitally-Assisted and Delay Compensated Comparators for Biomedical Implantable Devices

Catherine Dehollain, Alexandre Schmid

This paper presents the design of a 13.56 MHz full-wave active rectifier that utilizes digitally-assisted and delay compensated comparators for wirelessly powered biomedical implants. The proposed design employs delay compensation and digital assistance te ...

New York2023

Design of a Dual-Band Wireless Power and Data Transfer Coil for Multisite Biomedical Implants

Catherine Dehollain, Alexandre Schmid

This paper introduces a dual-band inductive link designed to operate at both 6.78 and 13.56 MHz in the industrial, scientific, and medical (ISM) bands. The primary aim is to facilitate wireless power and data transmission in multisite biomedical implants. ...

New York2023

A Wireless Power and Bi-Directional Data Transfer System Using A Single Inductive Link for Biomedical Implants

Catherine Dehollain, Alexandre Schmid

This paper presents a wireless power and data conversion unit, designed to receive power and data via a single inductive link with a focus on applications in implanted biomedical devices. The system provides a reliable power supply for electronic circuits ...

Institute of Electrical and Electronics Engineers Inc.2023

Self-Powered Measurement System for Remote Monitoring of Human Metabolism

Catherine Dehollain, Sandro Carrara

Continuous and minimally invasive measurements of metabolism are the key to the understanding and proper treatment of various pathologies. In this context, this paper deals with an innovative concept of a wireless measurement system that monitors glucose c ...

IEEE2022

Cardiovascular monitoring system

Marco Mattavelli, Catherine Dehollain, Diego Ruben Barrettino, Kerim Türe, Mustafa Besirli

A cardiovascular monitoring system for measuring at least cardiac output comprises an implantable unit (2) configured for placement in a section of artery of a patient and a portable external unit (1) configured for mounting against or close to a patient's ...

2022

A 16-Channel Neural Recording System-on-Chip With CHT Feature Extraction Processor in 65-nm CMOS

Catherine Dehollain, Yusuf Leblebici, Volkan Cevher, Florian Dylan Fallegger, Stéphanie Lacour, Cosimo Aprile, Kerim Türe, Emilie Cornelia Maria Revol, Arda Uran, Alix Esther Anne Trouillet

Next generation invasive neural interfaces require fully implantable wireless systems that can record from a large number of channels simultaneously. However, transferring the recorded data from the implant to an external receiver emerges as a significant ...

2022

An Energy-Efficient Bridge-to-Digital Converter for Implantable Pressure Monitoring Systems

Marco Mattavelli, Catherine Dehollain, Diego Ruben Barrettino, Franco Maloberti, Kerim Türe, Mustafa Besirli

This paper presents an energy-efficient, duty-cycled, and spinning excitation bridge-to-digital converter (BDC) designed for implantable pressure sensing systems. The circuit provides the measure of the pulmonary artery pressure that is particularly releva ...

2022

An Implantable Inductive Sensor for Direct and Continuous Monitoring of the Pulmonary Artery Cross-Sectional Area

Marco Mattavelli, Catherine Dehollain, Diego Ruben Barrettino, Kerim Türe, Mustafa Besirli

This paper presents a novel method for the measure of the cross-sectional area (CSA) of an artery to be used for the direct and continuous (24/7) monitoring of cardiac output (CO). The method is based on the inductance change of an anchoring loop mounted o ...

IEEE2022