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  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 2300-2311 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A new model for impact ionization in Si is presented, which goes beyond the limitations of the Keldysh formula and is based on a more realistic scheme developed starting from a first-order perturbation theory. This scattering mechanism is modeled by an extended band structure which includes many bands for electrons and one band for holes in a finite Brillouin zone. Some processes have been identified to bring the dominant contribution to the scattering probability, in the present approach, for electron energies ranging up to 3 eV. Expressions for the differential and integrated scattering probabilities have been obtained which are consistent with the band model and can be included in a Monte Carlo simulation of the electron gas. Results for transport quantities are shown for a bulk material in presence of homogeneous and static electric fields under physical conditions where impact ionization influences the carrier dynamics. A comparison with theoretical and experimental data from the literature is also given.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Electrical engineering 54 (1972), S. 278-284 
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Contents A generalization of graph theory is given which is suitable for solving the problem of topological circuit integration. A generalized graph consists of branches and spiders on a set of nodes.
    Notes: Übersicht Es wird eine Verallgemeinerung der Graphentheorie angegeben, die zur Lösung des Problems der topologischen Schaltungsintegration geeignet ist. Ein verallgemeinerter Graph besteht aus Zweigen und Spinnen auf einer Knotenmenge.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Electrical engineering 54 (1972), S. 269-277 
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Contents The voltage induced at the electrodes of an inductive flowmeter is given for a spatially inhomogeneous magnetic field and an arbitrary velocity profile. It is shown that the results for the 2-dimensional case, which have been given in the I. part [1], hold for the mean value of the signal $$\frac{1}{{2\pi a}}\int\limits_{ - \infty }^\infty {U\left( {z',\psi } \right)dz'} $$ .
    Notes: Übersicht Die an den Elektroden eines induktiven Durchflußmessers induzierte Spannung wird für räumlich inhomogenes zeitlich konstantes Magnetfeld und beliebiges Geschwindigkeitsprofil angegeben. Es wird gezeigt, daß für das gemittelte Signal $$\frac{1}{{2\pi a}}\int\limits_{ - \infty }^\infty {U\left( {z',\psi } \right)dz'} $$ die Ergebnisse des ebenen Falles gelten, die im I. Teil [1] hergeleitet wurden.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Electrical engineering 53 (1970), S. 344-359 
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Contents Proceeding from Maxwell-Minkowski Equations the induced voltage of an inductive flow meter is studied for conducting liquids in case of an inhomogeneous magnetic field and an arbitrary velocity profile. — It is shown: 1. In the most general case the induced voltage is not proportional to the flow. An expression for the calculation is derived. — 2. The mean value of the signal weighted by sin ψ $$\frac{2}{\pi }\int {U(\psi )} \sin \psi d\psi $$ is proportional to the flow in case of a homogeneous magnetic field and arbitrary velocity profile as well as in case of an arbitrary plane inhomogeneous magnetic field and a velocity profile with axial symmetry.
    Notes: Übersicht Ausgehend von den Feldgleichungen wird für leitende Flüssigkeiten die an den Elektroden eines induktiven Durchflußmessers induzierte Spannung bei inhomogenem, zeitlich konstantem Magnetfeld und beliebigem Geschwindigkeitsprofil untersucht. — Es wird gezeigt: 1. Die induzierte Spannung ist dem Durch-fluß im allgemeinen Falle nicht proportional. Ein Ausdruck zu ihrer Berechnung wird angegeben. 2. Das mit sin ψ gewichtete gemittelte Signal $$\frac{2}{\pi }\int {U(\psi )} \sin \psi d\psi $$ ist dem Durchfluß in Strenge proportional, sowohl bei homogenem Magnetfeld und beliebigem Geschwindigkeitsprofil als auch bei beliebig eben inhomogenem Magnetfeld und radialysmmetrischem Geschwindigkeitsprofil.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Electrical engineering 54 (1972), S. 325-336 
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Contents Programable algorithms for planarity analysis and planarization of generalized graphs are given. The planarization is carried out by means of two operators for incidence transformations. These operators have a certain significance in each technology.
    Notes: Übersicht Zur Planaritatsanalyse und Planarisierung nichtebener verallgemeinerter Graphen werden programmierbare Algorithmen angegeben. Die Planarisierung erfolgt durch zwei Operatoren für Inzidenztransformationen, die in jeder Technologie einen bestimmten Begriffsinhalt haben.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Electrical engineering 54 (1972), S. 315-324 
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Contents Component placement and wire routing are looked at as a coupled surface layering problem on two planes. This problem can be formulated as a graph theoretical synthesis problem if the lateral dimensions of components and wiring are neglected.
    Notes: Übersicht Bauelement- und Verdrahtungsplazierung werden als ein gekoppeltes Flächenparkettierungsproblem auf zwei Ebenen erkannt. Dieses Problem läßt sich bei Vernachlässigung der flächenhaften Ausdehnung der Bauelemente und Verdrahtungsbahnen als ein graphentheoretisches Syntheseproblem formulieren.
    Type of Medium: Electronic Resource
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