3,991 research outputs found
Single-mask thermal displacement sensor in MEMS
In this work we describe a one degree-of-freedom microelectromechanical thermal\ud
displacement sensor integrated with an actuated stage. The system was fabricated in the device layer of a silicon-on-insulator wafer using a single-mask process. The sensor is based on the temperature dependent electrical resistivity of silicon and the heat transfer by conduction through a thin layer of air. On a measurement range of 50 μm and using a measurement bandwidth of 30 Hz, the 1-sigma noise corresponds to 3.47 nm. The power consumption of the sensor is 209 mW, almost completely independent of stage position. The drift of the sensor over a measurement period of 32 hours was 32 nm
A review of advances in pixel detectors for experiments with high rate and radiation
The Large Hadron Collider (LHC) experiments ATLAS and CMS have established
hybrid pixel detectors as the instrument of choice for particle tracking and
vertexing in high rate and radiation environments, as they operate close to the
LHC interaction points. With the High Luminosity-LHC upgrade now in sight, for
which the tracking detectors will be completely replaced, new generations of
pixel detectors are being devised. They have to address enormous challenges in
terms of data throughput and radiation levels, ionizing and non-ionizing, that
harm the sensing and readout parts of pixel detectors alike. Advances in
microelectronics and microprocessing technologies now enable large scale
detector designs with unprecedented performance in measurement precision (space
and time), radiation hard sensors and readout chips, hybridization techniques,
lightweight supports, and fully monolithic approaches to meet these challenges.
This paper reviews the world-wide effort on these developments.Comment: 84 pages with 46 figures. Review article.For submission to Rep. Prog.
Phy
A Novel Piezoelectric Microtransformer for Autonmous Sensors Applications
This work relates to a novel piezoelectric transformer to be used in an
autonomous sensor unit, possibly in conjunction with a RF-MEMS retro-modulator.Comment: Submitted on behalf of EDA Publishing Association
(http://irevues.inist.fr/handle/2042/16838
A Radiation hard bandgap reference circuit in a standard 0.13um CMOS Technology
With ongoing CMOS evolution, the gate-oxide thickness steadily decreases, resulting in an increased radiation tolerance of MOS transistors. Combined with special layout techniques, this yields circuits with a high inherent robustness against X-rays and other ionizing radiation. In bandgap voltage references, the dominant radiation-susceptibility is then no longer associated with the MOS transistors, but is dominated by the diodes. This paper gives an analysis of radiation effects in both MOSdevices and diodes and presents a solution to realize a radiation-hard voltage reference circuit in a standard CMOS technology. A demonstrator circuit was implemented in a standard 0.13 m CMOS technology. Measurements show correct operation with supply voltages in the range from 1.4 V down to 0.85 V, a reference voltage of 405 mV 7.5 mV ( = 6mVchip-to-chip statistical spread), and a reference voltage shift of only 1.5 mV (around 0.8%) under irradiation up to 44 Mrad (Si)
Coherent modulation up to 100 GBd 16QAM using silicon-organic hybrid (SOH) devices
We demonstrate the generation of higher-order modulation formats using
silicon-based inphase/quadrature (IQ) modulators at symbol rates of up to 100
GBd. Our devices exploit the advantages of silicon-organic hybrid (SOH)
integration, which combines silicon-on-insulator waveguides with highly
efficient organic electro-optic (EO) cladding materials to enable small drive
voltages and sub-millimeter device lengths. In our experiments, we use an SOH
IQ modulator with a {\pi}-voltage of 1.6 V to generate 100 GBd 16QAM signals.
This is the first time that the 100 GBd mark is reached with an IQ modulator
realized on a semiconductor substrate, leading to a single-polarization line
rate of 400 Gbit/s. The peak-to-peak drive voltages amount to 1.5 Vpp,
corresponding to an electrical energy dissipation in the modulator of only 25
fJ/bit
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