Searched for: author:"Serdijn, W.A."
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Akgün, O.C. (author), Mangia, Mauro (author), Pareschi, Fabio (author), Rovatti, Riccardo (author), Setti, Gianluca (author), Serdijn, W.A. (author)
This paper presents the design of an ultra-low energy, rakeness-based compressed sensing (CS) system that utilizes time-mode (TM) signal processing (TMSP). To realize TM CS operation, the presented implementation makes use of monostable multivibrator based analog-to-time converters, fixed-width pulse generators, basic digital gates and an...
conference paper 2019
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Wardhana, Gandhika K (author), Serdijn, W.A. (author), Vollebregt, S. (author), Giagka, V. (author), Vollebregt, Sten (author)
Neural interface in the form of microelectrodes are used to monitor and treat spinal cord injury and other neurological disorders by the means of recording and stimulation. Despite of the apparent result of these electrical interventions, understanding of the mechanism behind neural stimulation is still inadequate. The use of optical monitoring...
abstract 2019
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Martins da Ponte, R. (author), Huang, C. (author), Giagka, V. (author), Serdijn, W.A. (author)
Optogenetics is a neuromodulation method that holds great potential for the realization of advanced neuroprostheses due to its precise spatial-temporal control of neuronal activity [1]. The development of novel optogenetic implants (optrodes) may open new doors to investigate complex brain circuitry and chronical brain disorders, such as...
abstract 2019
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Bakhshaee Babaroud, N. (author), Kluba, M.M. (author), Dekker, R. (author), Serdijn, W.A. (author), Giagka, V. (author)
Active implantable medical devices have been developed for diagnosis, monitoring and treatment of large variety of neural disorders. Since the mechanical properties of these devices need to be matched to the tissue, soft materials, such as polymers are often preferred as a substrate [1]. Parylene is a good candidate, as it is highly...
abstract 2019
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Martins da Ponte, R. (author), Giagka, V. (author), Serdijn, W.A. (author)
Incubators in cell cultures are used to grow and maintain cells under optimal temperature alongside other key variables, such as pH, humidity, atmospheric conditions etc. As enzymatic activity and protein synthesis proceed optimally at 37.5 oC, a temperature rise can cause protein denaturation, whereas a drop in temperature can slow down...
abstract 2019
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Nanbakhsh, K. (author), Serdijn, W.A. (author), Giagka, V. (author)
The main goal of bioelectronic medicine is to, one day, replace conventional chemical drugs with miniaturized implants. This way, tiny electrical pulses will be locally delivered to a small group of neurons in order to influence and modify biological functions. Developing such implants, however, has brought many new challenges both in the...
abstract 2019
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Malissovas, Anastasios (author), Serdijn, W.A. (author), Giagka, V. (author)
As the era of Bioelectronic medicines (BEms) evolves, new technological challenges are generated, including miniaturized devices that are encapsulated with flexible materials and energized by wireless power transmission (WPT) techniques. Among them, magnetostatic, also known as inductive, and ultrasound (US) are the most viable candidates for...
abstract 2019
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Pak, A. (author), Serdijn, W.A. (author), Giagka, V. (author)
Electronic components in the form of application-specific integrated circuits (ASICs) establishing the communication between the body and the implant, such as stimulation and recording, have, nowadays, become essential elements for current and future generations of implantable devices, as medicine is looking into substituting its traditional...
abstract 2019
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Urso, A. (author), Serdijn, W.A. (author)
In this paper, a power-efficient multiphase Recursive Switched Capacitor (RSC) converter is presented. Conventionally, RSC converters are used to obtain many different output voltages from a fixed input voltage. Here, the converter provides a fixed output voltage of 1 V at 1 mA from an input voltage ranging from 1.4 V to 4.5 V. It has one...
conference paper 2018
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Rezaeiyan, Y. (author), Zamani, M. (author), Shoaei, Omid (author), Serdijn, W.A. (author)
There is an increasing demand for low power, low voltage, and small size analog readout bio-potential systems. This paper presents an analog front-end for measuring the intra-cardiac signals in implantable and also external ambulatory ECG cardiac recording applications. The analog front-end benefits from voltage to frequency conversion...
journal article 2018
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Dezyani, M. (author), Ghafoorifard, Hassan (author), Sheikhaei, Samad (author), Serdijn, W.A. (author)
This paper presents a 60 mV input voltage start-up system for thermoelectric energy harvesting. A new process tolerant inverter cell is proposed, which is functional at supply voltages as low as 60 mV. Using the proposed unit cell, a ring <br/>oscillator has been implemented. The ring oscillator is followed by 40 charge-pump stages, an ultra...
journal article 2018
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Rezaeiyan, Y. (author), Zamani, M. (author), Shoaei, Omid (author), Serdijn, W.A. (author)
A low-power mixed-signal IC for implantable pacemakers is presented. The proposed system features three independent intracardiac signal readout channels with pulse-width-modulated outputs. Also, the proposed system is capable of measuring the amplitude and phase of the bioimpedance with pulse-width-modulated outputs for use in rate adaptive...
journal article 2018
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Rout, S. (author), Serdijn, W.A. (author)
Cardiac signal acquisition with high linearity and accuracy of the high-pass cut-off frequency imposes a challenge on the implementation of the analog preprocessing and the analog-to-digital converter. This paper describes a state-space-based methodology for designing high-pass sigma-delta (HP Sigma \Delta topologies with high linearity,...
journal article 2018
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Martins da Ponte, R. (author), Giagka, V. (author), Serdijn, W.A. (author)
This paper reports on the design and fabrication of a time-mode signal-processing in situ temperature sensor customized for an organ-on-a-chip (OOC) application. The circuit was fabricated using an in-house integrated circuit (IC) technology that requires only seven lithographic steps and is compatible with MEMS fabrication process. The...
conference paper 2018
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Campos Martins, G. (author), Serdijn, W.A. (author)
In this paper we present the design and simulation results of an RF energy harvesting circuit that operates across a wide range of available input power, from -27 dBm to 6 dBm. The system comprises an adaptive impedance matching network, a single-stage cross-connected differential rectifier, a start-up charge pump, an adaptive buck-boost...
conference paper 2018
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Tacchetti, Lucia (author), Serdijn, W.A. (author), Giagka, V. (author)
This paper presents the design of a neurostimulator performing biphasic ultra-high-frequency electrical stimulation while being driven from ultrasound energy. Unlike conventional constant current or constant voltage stimulators or state-of-the-art ultra-high-frequency stimulators, the system does not convert the input AC signal into regulated...
conference paper 2018
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Olafsdottir, Gudrun Erla (author), Serdijn, W.A. (author), Giagka, V. (author)
This paper presents the design and fabrication of an implantable control unit intended for epidural spinal cord stimulation (ESCS) in rats. The device offers full programmability over stimulation parameters and delivers a constant current to an electrode array to be located within the spinal canal. It implements an adaptive voltage compliance...
conference paper 2018
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Giagka, V. (author), Serdijn, W.A. (author)
Patients suffering from conditions such as paralysis, diabetes or rheumatoid arthritis could in the future be treated in a personalised manner using bioelectronic medicines (BEms) (Nat Rev Drug Discov 13:399–400, 2013, Proc Natl Acad Sci USA 113:8284–9, 2016, J Intern Med 282:37–45, 2017). To deliver this personalised therapy based on...
journal article 2018
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Nassirinia, F. (author), Straver, W.G.M.M. (author), Hoebeek, Freek E. (author), Serdijn, W.A. (author)
Animal studies are often used to test the feasibility and effectiveness of neuroscience research ideas. Optogenetics is a state-of-the-art technique that allows researchers to control brain activity with light. Current methods are limited as they use tethered setups with the animal in a fixed position, resulting in stress and reduced animal...
conference paper 2017
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Stoopman, M. (author), Philips, Kathleen (author), Serdijn, W.A. (author)
This paper presents the system and circuit design of a compact radio frequency (RF)-powered 2.4-GHz CMOS transmitter (TX) to be used for autonomous wireless sensor nodes (WSNs). The proposed TX utilizes the received dedicated RF signal for both energy harvesting as well as frequency synthesis. A TX RF carrier is derived from the received RF...
journal article 2017
Searched for: author:"Serdijn, W.A."
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