Publications de 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

Alexandre Schmid, Catherine Dehollain

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

Alexandre Schmid, Catherine Dehollain

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

Andreas Peter Burg, Catherine Dehollain

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

Alexandre Schmid, Catherine Dehollain

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

Sandro Carrara, Catherine Dehollain, 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

Alexandre Schmid, Catherine Dehollain

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, Andreas Peter Burg, Catherine Dehollain, 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

Alexandre Schmid, Catherine Dehollain

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