We study percolation in a random resistor-diode network on the simple cubic lattice. Here the occupied bonds joining nearest-neighbour sites may be either resistor-like, transmitting information or connectivity in either direction along a bond, or diode-like, transmitting in only one direction. We consider a model in which there exist both positive diodes which transmit in the fx, + y or + z di...

A novel ballast resistor network is proposed to achieve a better thermal management in HBT power cells without degrading the RF performances. Experiments were conducted on two HBT power amplifiers. They occupy same area. One was designed using conventional ballast network. The other uses proposed novel network. Temperature comparisons were made based on the same current density. Infrared camera...

We study percolation and conduction in a randomly diluted network in which the occupied bonds may be either resistor-like, transmitting connectivity in both directions along a bond, or diode-like, transmitting in only one direction. This system exhibits novel phase transitions signalling the onset of infinite clusters with either isotropic or unidirectional connectivity. Position-space renormal...

Experimental I(V) characteristics of a lattice are reported. Each bond of the lattice is a non linear resistor characterized by a threshold 03C5g for the potential drop below which it becomes an insulator. If the thresholds are randomly distributed, the current I flowing through the lattice is a quadratic function of the voltage V, as predicted by Roux and Herrmann. J. Physique 48 (1987) 1609-1...

The object of this paper is to show that a certain system of nonlinear differential equations has one and only one periodic solution. These equations are of interest in that they describe the vibrations of a common type of electric network; therefore, the physical origin of the equations will be discussed first. A linear network is a collection of linear inductors, linear resistors, and linear ...

A field-theoretic formulation is used to describe the resistive properties of a randomly diluted network consisting of nonlinear conductances for which V~Ir. The nonlinear resistance R(x,x’) between sites x and x’ is expressed in terms of an analytic continuation in an associated crossover field. The renormalization-group recursion relations are analyzed within this analytic continuation to ord...

Recently an isotropic resistive network that performs a Gaussian ltering of an image for pre-processing tasks in image analysis has been proposed. In this paper, starting from biological considerations on cortical organization, we propose an anisotropic resistive network able to extract local features of an image, that can be used to detect variations of texture and to perform higher level visu...

Numerical calculations of anisotropic hopping transport based on the resistor network model are presented. Conductivity is shown to follow the stretched exponential dependence on temperature with exponents increasing from 14 to 1 as the wave functions become anisotropic and their localization length in the direction of charge transport decreases. For sufficiently strong anisotropy, this results...

The Switched-Resistor (S-R) technique is becoming more and interesting to implement low-voltage low-power active- RC filters with high tuning range front-end amplifiers for biomedical circuits systems. This approach exploits MOS switches driven by a duty-cycle-controlled clock signal achieve tunability of the equivalent resistance and, hence, time constant. Since S-R can be considered as linear...