Searched for: subject%3A%22Sigma%255C+Delta%255C+modulator%22
(1 - 17 of 17)
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Yousefzadeh, B. (author)
Temperature greatly affects the performance of integrated circuits, and so temperature sensors are often necessary to ensure reliable operation and stable performance. The goal of the work described in this thesis is to realize a temperature sensor in CMOS technology that can be produced at low cost. In the first step, a temperature sensor is...
doctoral thesis 2024
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Guo, Junwei (author)
MEMS microphones offer a significant scope to improve miniaturization, integration and cost of acoustic systems, poised to be the preferred microphone option for consumer electronics and medical advancements. A MEMS microphone needs a readout interface to convert the microphone’s output to a digital code for further processing, while its poor...
master thesis 2023
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Gupta, Avish (author)
Flow sensing is essential in various industrial, commercial, and biomedical applications. Although many types of flow sensors exist, thermal flow sensors are widely used due to their simple sensing elements (heaters and temperature sensors) and low fabrication costs. A low-cost interface for thermal flow sensors can then be realized with a...
master thesis 2023
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Sonmez, U. (author)
Today’s systems-on-chip (SOCs) and microprocessors are complex systems that require multiple temperature sensors to monitor temperature variations in multiple spots on a single silicon die. For such thermal management applications, specialized compact and fast temperature sensors are required. This is necessary because executing an intensive...
doctoral thesis 2020
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Angevare, J. (author), Makinwa, K.A.A. (author)
This paper describes a compact resistor-based temperature sensor that has been realized in a 180-nm CMOS process. It occupies only 6800 μ m<sup>2</sup>, thanks to the use of a highly digital voltage-controlled oscillator (VCO)-based phase-domain sigma-delta modulator, whose loop filter consists of a compact digital counter. Despite its small...
journal article 2019
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Sonmez, U. (author), Sebastiano, F. (author), Makinwa, K.A.A. (author)
An array of temperature sensors based on the thermal diffusivity (TD) of bulk silicon has been realized in a standard 40-nm CMOS process. In each TD sensor, a highly digital voltage-controlled oscillator-based Σ Δ ADC digitizes the temperature-dependent phase shift of an electrothermal filter (ETF). A phase calibration scheme is used to...
journal article 2017
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Sonmez, U. (author), Sebastiano, F. (author), Makinwa, K.A.A. (author)
VCO-based phase-domain ΣΔ modulators employ the combination of a voltage-controlled-oscillator (VCO) and an up/down counter to replace the analog loop filter used in conventional ΣΔ modulators. Thanks to this highly digital architecture, they can be quite compact, and are expected to shrink even further with CMOS scaling. This paper describes...
journal article 2017
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Jiang, H. (author), Vogel, J.G. (author), Nihtianova, S. (author)
This paper presents a direct digital converter for Wheatstone bridge sensors, which is realized with commercial off-the-shelf components. The power efficiency of the readout is enhanced by embedding the bridge sensor in a second-order continuous-time sigma-delta modulator (CTDeltaSigmaM). By directly digitizing the output signal of a Wheatstone...
journal article 2017
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Kostałkowski, M.K. (author)
Every year number of prematurely born infants grows. Most underdeveloped organ after birth is brain. Therefore its monitoring is very important, especially as it can provide indications about health state in a future, both short and long term. Non invasive method of brain monitoring is EEG recording. However tedious process of system set up and...
master thesis 2016
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Angevare, J.A. (author)
A highly digital temperature sensor, based on the thermal diffusivity of silicon, for thermal management applications has been reported. Recently, Thermal-Diffusivity based temperature sensors have undergone a radical change from an analog-based readout architecture to a more digital VCO-based one. However the more digital approach led to...
master thesis 2015
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Wu, J. (author)
Wind sensors are widely used in many critical applications, such as navigation, weather forecast, aerospace and wind energy assessment. The thermal wind sensor can measure wind speed and direction at the same time, by measuring the temperature gradient on the sensor’s surface which is induced by the wind flow. Compared to traditional mechanical...
master thesis 2013
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Hall, Drew A. (author), Gaster, Richard S. (author), Makinwa, K.A.A. (author), Wang, Shan X. (author), Murmann, Boris (author)
Magnetic nanotechnologies have shown significant potential in several areas of nanomedicine such as imaging, therapeutics, and early disease detection. Giant magnetoresistive spin-valve (GMR SV) sensors coupled with magnetic nanotags (MNTs) possess great promise as ultra-sensitive biosensors for diagnostics. We report an integrated sensor...
journal article 2013
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Singh, G. (author)
Bridge sensors are widely used for accurate measurement of physical quantities such as temperature, pressure, strain or altitude. Such sensors require a low-noise, high-resolution and accurate readout system with high input impedance. In order to meet these requirements, conventional sensor readout systems use multiple stages which typically...
master thesis 2011
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Bolatkale, M. (author), Breems, LJ (author), Rutten, Robert (author), Makinwa, K.A.A. (author)
A 4 GHz third-order continuous-time ΔΣ ADC is presented with a loop filter topology that absorbs the pole caused by the input capacitance of its 4-bit quantizer and also compensates for the excess delay caused by the quantizer's latency. The ADC was implemented in 45 nm-LP CMOS and achieves 70 dB DR and -74 dBFS THD in a 125 MHz BW, while...
journal article 2011
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Kashmiri, S.M. (author), Xia, S. (author), Makinwa, K.A.A. (author)
This paper describes the design of a CMOS temperature-to-digital converter (TDC). It operates by measuring the temperature-dependent phase shift of an electrothermal filter (ETF). Compared to previous work, this TDC employs an ETF whose layout has been optimized to minimize the thermal phase spread caused by lithographic inaccuracy. To minimize...
journal article 2009
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Breems, L.J. (author)
doctoral thesis 2001
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Mekonnen, D.B. (author)
doctoral thesis 1998
Searched for: subject%3A%22Sigma%255C+Delta%255C+modulator%22
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