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Someya, T. (author), Van Hoek, Vincent (author), Angevare, J. (author), Pan, S. (author), Makinwa, K.A.A. (author)This letter describes an NPN-based temperature sensor that achieves a 1-point trimmed inaccuracy of ±0.15 °C (3σ) from -15 to 85 °C while dissipating only 210 nW. It uses a dual-mode frontend to roughly halve the power consumption of conventional frontends. First, two NPNs are used to generate a well-defined PTAT bias current, then this...journal article 2022
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Cai, Liying (author), Lu, Zhenghao (author), Tang, Z. (author), Yu, Xiaopeng (author)This letter presents a low-power dB-linear variable gain amplifier (VGA) with a small linear-in-dB error over a wide gain tuning range. An exponential current ratio is realized in the linear-in-dB control circuit based on the subthreshold I-V characteristic. The VGA is built with subthreshold common-gate transistors as current steering,...journal article 2022
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Mohammad Zaki, A.R. (author), Nihtianova, S. (author)This article presents the experimentally characterized performance of a low noise and wideband sensor readout integrated circuit (ROIC). The ROIC is designed to detect small amounts of charge generated by a silicon p-i-n detector as a result of particle detection, with very high time resolution and limited power consumption. The architecture...journal article 2022
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Pimenta, Matheus (author), Gürleyük, C. (author), Walsh, Paul (author), O’Keeffe, Daniel (author), Babaie, M. (author), Makinwa, K.A.A. (author)This article presents a low-power eddy-current sensor interface for touch applications. It is based on a bang-bang digital phase-locked loop (DPLL) that converts the displacement of a metal target into digital information. The PLL consists of a digitally controlled oscillator (DCO) built around a sensing coil and a capacitive DAC, a...journal article 2021
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de Laat, Willem (author), Roeleveld, Rein (author)The objective of the bachelor graduation project detailed in this thesis is to develop a wireless sensor patch that monitors the health of newborns. The sensor patch replaces the monitoring tasks of nurses during maternity care. The patch measures temperature, heart rate, oxygen saturation and bilirubin. Many babies are born with high bilirubin,...bachelor thesis 2020
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Pan, S. (author), Makinwa, K.A.A. (author)This letter presents a compact, energy-efficient, and low-power Wheatstone-bridge temperature sensor for biomedical applications. To maximize sensitivity and reduce power dissipation, the sensor employs a high-resistance (600 kΩ ) bridge that consists of resistors with positive (silicided-poly) and negative ( n -poly) temperature coefficients...journal article 2020
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Someya, T. (author), Islam, A. K.M.Mahfuzul (author), Okada, Kenichi (author)A 6.4 nW 1.7% relative inaccuracy (R-IA) CMOS sub-thermal drain voltage-based temperature sensor is proposed. The proposed stabilized sub-thermal drain voltage current generator achieves a highly linear PTAT output without nonlinearity fitting or post-fabrication trimming and increases the accuracy of the sensor. A combination of the current...journal article 2020
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Urso, A. (author), Giagka, Vasiliki (author), van Dongen, M.N. (author), Serdijn, W.A. (author)In order to recruit neurons in excitable tissue, constant current neural stimulators are commonly used. Recently, ultra high-frequency (UHF) stimulation has been proposed and proven to have the same efficacy as constant-current stimulation. UHF stimulation uses a fundamentally different way of activating the tissue: each stimulation phase is...journal article 2019
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- Steunebrink, Tim (author) master thesis 2018
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Kolağasioğlu, Eralp (author)Cardiovascular diseases are the leading cause of death in the devel- oped world. Preventing these deaths, require long term monitoring and manual inspection of ECG signals, which is a very time consum- ing process. Consequently, a wearable system that can automatically categorize beats is essential.<br/>Neuromorphic machines have been introduced...master thesis 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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- Babaie, M. (author) doctoral thesis 2016
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Enachescu, M. (author)The availability of inexpensive and powerful processors provides the means for the computation ecosystem to change its fundamental paradigm towards the Internet of Things (IoT) where ubiquitous nanosystems add intelligence to every object that surrounds us. The new trend for most of those systems is to autonomously operate into a “zero-power”...doctoral thesis 2016
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Cheung, T. (author), Van Leeuwen, L.T.J. (author)Voor het Bachelor Afstudeer Project van groep I is BabyShell ontwikkeld. BabyShell is een draagbaar apparaat dat in staat is om jonge ouders en zwangere vrouwen te helpen om een voorlopige diagnose te stellen van medische problemen van hun kinderen. Ook is BabyShell in staat om temperatuur op te nemen en belangrijke data bij te houden zoals...bachelor thesis 2015
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Bakker, J.P. (author), Jongeling, A.C.G. (author)In ontwikkelingslanden zijn er nog altijd veel problemen met de gezondheid van zwangere vrouwen en jonge kinderen. Daarom is voor dit Bachelor afstudeerproject BabyShell ontwikkeld: een draagbaar apparaat dat onafhankelijk is van het stroomnet en door middel van een vraag-antwoord proces diagnoses voor medische problemen kan stellen. BabyShell...bachelor thesis 2015
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Blutman, K. (author)This work introduces a low-power Cortex-M0+ based computing platform for battery-powered, embedded applications. Voltage stacking is used to save power by recycling charge through a power domain between 0V and Vdd, and a power domain stacked on top of it between Vdd and 2Vdd. The technique enables connecting chips of the future directly to the...master thesis 2014
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Tohidian, M. (author), Madadi, I. (author), Staszewski, R.B. (author)In this paper, we propose a discrete-time IIR low-pass filter that achieves a high-order of filtering through a charge-sharing rotation. Its sampling rate is then multiplied through pipelining. The first stage of the filter can operate in either a voltage-sampling or charge-sampling mode. It uses switches, capacitors and a simple gm-cell, rather...journal article 2014
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Timmermans, T.T.M. (author)In a modern environment users are more dependant on their ability to use their mobile phone for nearly everything. They communicate with almost any device and those devices provide nearly limitless access to for instance a watch or in new applications, a lock. Issues encountered with these devices are the almost always lack the ability to keep...master thesis 2014
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Elumalai, I. (author)Voltage reference buffers have always been the most power-hungry blocks in switched-capacitor SAR ADCs. High frequency dynamic loading of the buffer by the capacitive DAC causes glitches on the reference voltage, and the buffer has to be fast enough to recover such transients to 1/2 LSB precision in every bit cycle. Such stringent requirements...master thesis 2013
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Dyachenko, V.A. (author)In this work a low power SAR ADC with 8.9 ENOB for wireless communication systems is presented. A capacitive charge redistribution DAC with a unit capacitor of 0.5fF is used. The implemented charge-sharing technique, allows the use of 2^(N-1) + 1 unit capacitors, instead of the conventional 2^N , thus decreasing the DAC area and the DAC...master thesis 2012
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