Results 31 to 40 of about 231,200 (296)
Journal of Research of the National Bureau of Standards, 1987 We describe the design, schematics, and performance of a very low noise FET cascode input amplifier. This amplifier has noise performance of less than [Formula: see text] and 0.25 [Formula: see text] over the 500 Hz to 50 kHz frequency range. The amplifier is presently being used in conjunction with a Penning ion trap but is applicable to a wide ...
Jefferts, Steven R., Walls, F. L.
openaire +1 more source
Investigation of the possibility of increasing the sensitivity of a microwave radiometer [PDF]
ITM Web of Conferences, 2019 The results of a sensitivity study of various types of quadratic detectors for a microwave radiometer are presented, both with and without a low-noise amplifier.
Luchinin Alexander, Malygin Ivan
doaj +1 more source
Ultrastable low-noise current amplifier
, 2014 An ultrastable low-noise current amplifier (ULCA) is presented. The ULCA is a non-cryogenic instrument based on specially designed operational amplifiers and resistor networks.
Ahlers, Franz Josef +4 more
core +1 more source
, 2012 A new method of absolute calibration of sky noise temperature using a three-position switched spectrometer, measurements of antenna and low noise amplifier impedance with a vector network analyzer, and ancillary measurements of the amplifier noise waves ...
Bowman, Judd D., Rogers, Alan E. E.
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56.6 dB high gain L-band EDFA utilizing short-length highly-doped erbium rare-earth material [PDF]
Journal of the European Optical Society-Rapid Publications, 2014 In this paper, we experimentally investigate the performance of an efficient high gain L-band erbium-doped fiber (EDF) amplifier structure utilizing short-length highly-doped erbium rare-earth material with a single pump source.
Al-Mansoori M. H., Al-Ghaithi W. S.
doaj +1 more source
Experimental Determination of the Gain Distribution of an Avalanche Photodiode at Low Gains
, 2008 A measurement system for determining the gain distributions of avalanche photodiodes (APDs) in a low gain range is presented. The system is based on an ultralow-noise charge--sensitive amplifier and detects the output carriers from an APD.
Akiba, Makoto +2 more
core +1 more source
Low noise tuned amplifier [PDF]
, 1984 A bandpass amplifier employing a field effect transistor amplifier first stage is described with a resistive load either a.c. or directly coupled to the non-inverting input of an operational amplifier second stage which is loaded in a Wien Bridge ...
Kleinberg, L. L.
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Molecular Oncology, EarlyView.Tumors contain diverse cellular states whose behavior is shaped by context‐dependent gene coordination. By comparing gene–gene relationships across biological contexts, we identify adaptive transcriptional modules that reorganize into distinct vulnerability axes.
Brian Nelson +9 more
wiley +1 more source
, 2005 Two large-area, low noise, high speed fluorescence detectors have been built. One detector consists of a photodiode with an area of 28 mm x 28 mm and a low noise transimpedance amplifier.
D. DeMille +4 more
core +3 more sources
A low-noise series-array Josephson junction parametric amplifier [PDF]
, 1996 We have obtained parametric gain at 19 GHz from a distributed Josephson junction parametric amplifier whose active gain medium consists of a series array of 1000 Josephson junctions embedded in a coplanar waveguide.
Movshovich, R. +3 more
core +1 more source