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An Ultra‐Low‐Temperature Alternating Current Filter
Small, 2023AbstractTraditional alternating current filter based on aluminum electrolytic capacitors (AECs) suffer from abrupt drop of filtering capability at ultra‐low temperatures (≤−30 °C), which greatly hinders the reliable working of electronics at extremely cold conditions.
Chenguang Zhang +6 more
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Fast crystal growth at ultra-low temperatures
Nature Materials, 2021It is believed that the slow liquid diffusion and geometric frustration brought by a rapid, deep quench inhibit fast crystallization and promote vitrification. Here we report fast crystal growth in charged colloidal systems under deep supercooling, where liquid diffusion is extremely low.
Qiong Gao +10 more
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Journal of Magnetic Resonance, 2016
Since the infancy of NMR spectroscopy, sensitivity and resolution have been the limiting factors of the technique. Regular essential developments on this front have led to the widely applicable, versatile, and powerful spectroscopy that we know today.
Lee, Daniel +4 more
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Since the infancy of NMR spectroscopy, sensitivity and resolution have been the limiting factors of the technique. Regular essential developments on this front have led to the widely applicable, versatile, and powerful spectroscopy that we know today.
Lee, Daniel +4 more
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Ultra-low power CMOS cells for temperature sensors
Proceedings of the 18th annual symposium on Integrated circuits and system design - SBCCI '05, 2005Temperature sensors and voltage references require cells that generate both PTAT (Proportional To Absolute Temperature) and NTC (Negative Temperature Coefficient) voltages. We present a novel theoretical approach based on a 'quasi-constant' current to obtain these voltages in standard CMOS technology using no resistors. A test circuit was fabricated in
Conrado Rossi, Pablo Aguirre
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Crystallography of Biological Macromolecules at Ultra-Low Temperature
Annual Review of Biophysics and Biophysical Chemistry, 1990EQUIPMENT FOR CRYOCRYSTALLOGRAPHY . . . . . . . " " .... """"" ...... " ....... "." ...... ,,. 113 Heater-Generated Gas Flow" ... . . . "" ... """" ...... " ...... "" ...... """ ...... "" ...... " ..... """".. 114 Heat-Exchanger System "'"'' ' ' ' ' '''''' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ''''''''' ''''' ' ' ' ' ' ' ' ' ' ' '' ' ' ' ' '
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Optical interferometry at ultra low temperatures
Journal of Low Temperature Physics, 1995We have developed optical, interferometric methods for investigations of interfaces at ultra low temperatures. In our scheme conventional optical windows are avoided: laser illumination (He-Ne) is guided into the cryostat via a single-mode optical fiber and images are taken using a CCD sensor mounted inside the 4-K vacuum can.
P. J. Hakonen +3 more
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Energy-Efficient Technologies for Ultra-Low Temperature Refrigeration
2022Sustainable transition is ongoing in many refrigeration and heat pump applications following what is established in national and international regulations. However, many of them have not controlled ultra-low temperature refrigeration (at –80 °C) because of the challenges associated with these systems’ operation.
Udroiu, Cosmin-Mihai +3 more
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Ultra Low Temperature Ultra Low Power Instrument Packages for Planetary Surfaces
AIP Conference Proceedings, 2010Achievement of solar system exploration roadmap goals will involve robotic or human deployment and longterm operation of surface science packages remote from human presence, thus requiring autonomous, self-powered operation. The major challenge such packages face will be operating during long periods of darkness in extreme cold potentially without the ...
P. E. Clark +7 more
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2020 IEEE International Conference on Integrated Circuits, Technologies and Applications (ICTA), 2020
This paper proposes an ultra-low power relaxation oscillator with novel Ultra-Low Leakage Switch (ULLS) and temperature-compensated resistor (TCR). The ULLS decreases the leakage current over 90 dB, and the leakage variation against temperature can be also reduced about $\times 67$.
Yi Zhan +4 more
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This paper proposes an ultra-low power relaxation oscillator with novel Ultra-Low Leakage Switch (ULLS) and temperature-compensated resistor (TCR). The ULLS decreases the leakage current over 90 dB, and the leakage variation against temperature can be also reduced about $\times 67$.
Yi Zhan +4 more
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Ultra-low-power temperature compensated voltage reference generator
Microelectronics Journal, 2006Abstract A CMOS voltage reference generator, based on the difference between the gate–source voltages of two NMOS transistors, has been implemented with AMS 0.35 μm CMOS technology ( V thn = 0.45 and V thp = 0.75 V at 0 °C).
G. DE VITA, IANNACCONE, GIUSEPPE
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