Searched for: subject:"Clocks"
(1 - 15 of 15)
document
Ronchini Ximenes, A. (author), Padmanabhan, P. (author), Charbon, E.E.E. (author)
Direct time-of-flight (dTOF) image sensors require accurate and robust timing references for precise depth calculation. On-chip timing references are well-known and understood, but for imaging systems where several thousands of pixels require seamless references, area and power consumption limit the use of more traditional synthesizers, such as...
journal article 2018
document
Chen, Peng (author), Huang, Xiongchuan (author), Chen, Y. (author), Wu, Lianbo (author), Staszewski, R.B. (author)
To characterize an on-chip programmable delay in a low-cost and high-resolution manner, a built-in self-test based on a first-order ΔΣ time-to-digital converter with self-calibration is proposed and implemented in TSMC 28-nm CMOS. The system is self-contained, and only one digital clock is needed for the measurements. A...
journal article 2018
document
Pourmousavian, Seyednaser (author), Kuo, Feng-Wei (author), Siriburanon, Teerachot (author), Babaie, M. (author), Staszewski, R.B. (author)
This paper proposes an ultra-low-voltage (ULV) fractional-N all-digital PLL (ADPLL) powered from a single 0.5-V supply. While its digitally controlled oscillator (DCO) runs directly at 0.5 V, an internal switched-capacitor dc-dc converter ``doubles'' the supply voltage to all the digital circuitry and particularly regulates the time-to...
journal article 2018
document
Akter, S. (author), Sehgal, R.K. (author), van der Goes, Frank (author), Makinwa, K.A.A. (author), Bult, K. (author)
This paper presents a closed-loop class-AB residue amplifier for pipelined analog-to-digital converters (ADCs). It consists of a push-pull structure with a ``split-capacitor'' biasing circuit that enhances its power efficiency. The amplifier is inherently quite linear, and so incomplete settling can be used to save power while still...
journal article 2018
document
Karmakar, S. (author), Gonen, B. (author), Sebastiano, F. (author), van Veldhoven, Robert (author), Makinwa, K.A.A. (author)
This paper presents a dynamic zoom analog-to-digital converter for use in low-bandwidth (<1 kHz) instrumentation applications. It employs a high-speed asynchronous successive approximation register (SAR) ADC that dynamically updates the references of a fully differential Δ Σ ADC. Compared to previous zoom ADCs,...
journal article 2018
document
Xie, Y. (author), Janssen, G.J.M. (author), van der Veen, A.J. (author)
A clock synchronization scheme is crucial for obtaining accuracy in time-based positioning systems. Existing clock synchronization schemes are mostly based on a simplified linear clock model, which unfortunately have a poor long-term synchronization accuracy. Assuming a two-way time transfer protocol, we propose a novel clock synchronization...
conference paper 2016
document
Chepuri, S.P. (author)
In today's society, we are flooded with massive volumes of data in the order of a billion gigabytes on a daily basis from pervasive sensors. It is becoming increasingly challenging to locally store and transport the acquired data to a central location for signal/data processing (i.e., for inference). To alleviate these problems, it is evident...
doctoral thesis 2016
document
Dirkx, D. (author)
Measurements of the motion of natural (and artificial) bodies in the solar system provide key input on their interior structre and properties. Currently, the most accurate measurements of solar system dynamics are performed using radiometric tracking systems on planetary missions, providing range measurement with an accuracy in the order of 1 m....
doctoral thesis 2015
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Zaliasl, S (author), Salvia, JC (author), Hill, GC (author), Chen, L (author), Joo, K (author), Palwai, R (author), Arumugam, N (author), Phadke, M (author), Mukherjee, S (author), Lee, HC (author), Grosjean, C (author), Hagelin, PM (author), Pamarti, S (author), Fiez, TS (author), Makinwa, K.A.A. (author), Partridge, A (author), Menon, V (author)
This
journal article 2015
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Rajan, R.T. (author), Van der Veen, A.J. (author)
Synchronization and localization are critical challenges for the coherent functioning of a wireless network of mobile nodes. In this paper, a novel joint non-linear range and affine time model is presented based on two way time stamp exchanges, extending an existing affine time-range model. For a pair of nodes, a closed form pairwise least...
conference paper 2013
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Van Bree, R.J.P. (author), Tiberius, C.C.J.M. (author)
The performance of real-time single-frequency precise point positioning is demonstrated in terms of position accuracy. This precise point positioning technique relies on predicted satellite orbits, predicted global ionospheric maps, and in particular on real-time satellite clock estimates. Results are presented using solely measurements from a...
journal article 2011
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Hauschild, A. (author), Montenbruck, O. (author), Sleewaegen, J.M. (author), Huisman, L. (author), Teunissen, P.J.G. (author)
An analysis of observations from China’s first medium earth orbit satellite Compass M-1 is presented, with main focus on the first orbit and clock solution for this satellite. The orbit is computed from laser ranging measurements. Based on this orbit solution, the apparent clock offset is estimated using measurements from two GNSS receivers,...
journal article 2011
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Drago, Salvatore (author), Sebastiano, F. (author), Breems, LJ (author), Leenaerts, Domine M.W. (author), Makinwa, K.A.A. (author), Nauta, Bram (author)
This study describes a method of implementing a fully integrated ultra-low-power (ULP) radio for wireless sensor networks (WSNs). This is achieved using an ad hoc modulation scheme (impulse radio), with a bandwidth of 17.7 MHz in the 2.4 GHz-ISM band and a specific medium access control (MAC) protocol, based on a duty-cycled wake-up radio and a...
journal article 2009
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Schiller, S. (author), Tino, G.M. (author), Gill, E. (author)
The Einstein Gravity Explorer mission (EGE) is devoted to a precise measurement of the properties of space-time using atomic clocks. It tests one of the most fundamental predictions of Einstein’s Theory of General Relativity, the gravitational redshift, and thereby searches for hints of quantum effects in gravity, exploring one of the most...
journal article 2008
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Van Kasteren, J. (author)
More eloquent alternatives to the harsh tones of the oldfashioned alarm-clock bells abound, including a newsreaders voice summing up last nights disasters, or a tape of your favourite early morning music. Still, getting out of bed has its difficult moments. All this could well change in the near future, if Ir. Stephan Wensveen, a graduate...
journal article 2002
Searched for: subject:"Clocks"
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