Results 251 to 260 of about 960,191 (277)

Four-Terminal Thermal Conductance of Mesoscopic Dielectric Systems

Physical Review Letters, 2002
A four-terminal thermal conductance formula for a mesoscopic dielectric system with arbitrary central scattering region is derived. Similar to four-terminal electric conductance, the four-terminal thermal conductance also has a set of Onsager relations.
Qing-Feng, Sun, Ping, Yang, Hong, Guo
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Four-terminal operation of m.o.s. transistors

Proceedings of the Institution of Electrical Engineers, 1966
The charge induced in the channel of a silicon m.o.s.t. due to the capacitance of the depletion layer in the bulk material has a significant effect if the resistivity is less than about 10?cm. With the substrate short-circuited to the source, the pinchoff voltage is reduced.
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Four-terminal resistance of a ballistic quantum wire

Nature, 2001
The electrical resistance of a conductor is intimately related to the relaxation of the momentum of charge carriers. In a simple model, the accelerating force exerted on electrons by an applied electric field is balanced by a frictional force arising from their frequent collisions with obstacles such as impurities, grain boundaries or other deviations ...
R, de Picciotto, H L, Stormer, L N, Pfeiffer, K W, Baldwin, K W, West   +4 more
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Directly heated four-terminal phase change switches

2014 IEEE MTT-S International Microwave Symposium (IMS2014), 2014
Measured results of a four-terminal directly heated RF phase change switch are presented. Germanium telluride (GeTe) is used as the main resistance change element, connecting the RF input/output lines. The resistivity of GeTe is switched between the high-resistance amorphous-state value of several kΩ and low-resistance crystallized value of less than 3.
Muzhi Wang, Mina Rais-Zadeh
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Four terminal-pair to anything else!

IEE Colloquium Interconnections from DC to Microwaves, 1999
Before the impedance of a device can be measured properly it must first be defined by specifying appropriate electrical conditions at the terminals of the device where the conductors from the measuring instrument connect to it. It is then the business of the metrologist to ensure that these defining conditions, or ones equivalent to them, or ones which
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Synthesis of Four-terminal RC Active Filters

IETE Journal of Research, 1972
For the synthesis of active filters use of operational amplifiers is well known. In this paper, instead of using expensive operational amplifiers, a new technique is presented in which use has been made of a unity-gain amplifier in conjunction with a 4-terminal RC network for realization of a general class of filters possessing poles and zeroes of any ...
R. S. Shukla, B. N. Mishra
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Easy to build four-terminal AC bridge

Journal of Physics E: Scientific Instruments, 1986
A simple four-terminal AC bridge is described which can be used with germanium resistance thermometers down to 1K. The special features of the bridge are its ease of fabrication and extremely low cost.
Mukhopadhyay, PK, Raychaudhuri, AK
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A digital four terminal-pair impedance bridge

2016 Conference on Precision Electromagnetic Measurements (CPEM 2016), 2016
This paper describes a four terminal-pair digital impedance bridge aided by digital adaptive phase regulation. It allows the comparison of ac resistances and capacitances with outstanding accuracy and with measurement uncertainties bearing only some 10−06 Ω/Ω.
W. G. Kurten Ihlenfeld, R. T. B. Vasconcellos   +1 more
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Four-terminal-pair AC-standard resistances

Conference on Precision Electromagnetic Measurements, 2002
In the course of measuring four-terminal-pair capacitors (up to 1 MHz) by comparing them to AC-standard resistances, it became necessary to improve the design of the calculable element and its calculation. The set of calculable elements and the setup used to compare the AC-standard set to the calculable set are described.
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Electron waveguide coupler: A four-terminal device

Applied Physics Letters, 1991
We model the electron waveguide coupler as a four-terminal device, by considering the scattering at the interaction region between the electron waveguides. Transmission and reflection coefficients are evaluated for a variety of system parameters. Periodic switching of the electron wave between the waveguides are observed.
Jian Wang, Hong Guo, R. Harris
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