Conventional speech recognition systems require as input a sequence of acoustic vectors coding the relevant features of the speech signal. On the other hand the biological cochlea (inner ear) processes the speech signal to extract a neural coding suited for the higher levels of the brain. The background idea of this article is to interface an analogue electronic model of the cochlea with a stat...

Supply Current Testing (IDDQ) has become an important defect oriented test strategy for digital IC products. The technique takes advantage of the low quiescent supply current drawn by static CMOS circuits relative to the current consumption during state changes. However, in analogue and mixed signal IC’s this condition can rarely be observed, as in most circuits, steady state currents depend on...

In the theory of classical matroids, there are several known equivalent axiomatic systems that define a matroid, which described as matroid cryptomorphisms . A q -matroid is -analogue where subspaces play role subsets in theory. this article we establish -matroids. doing so highlight difference between and its -analogue. We introduce comprehensive set axiom show them existing -matroid. These ax...

An approach to integrated mixed-mode simulation is described in which the popular SPICE circuit simulator is extended to analyze digital circuits at the gate, functional or behavioral levels. The analogue-to-digital conversion is provided by (multilevel) parameterized “thresholders” which assign digital signals to subranges of voltages determined by a set of voltage thresholds. The digitalto-an...

The circuit presented in this paper aims at providing three 40 Vpp 50Hz AC voltages sources with 120o phase separation between them. This is a fully analogue circuit that uses standard, low-cost electronic components without resorting to a microcontroller as previously proposed by Shirvasar et al [1]. This circuit may serve as a basis for a low-voltage 3P-AC power supply that students may safel...

This paper proposes a simple analogue electronic spiking neuron circuit, which can be used to create hardware models of biological neural systems. In spite of its simplicity, the circuit is able to simulate a variety of different neuron types. Measurements of the neuron model in various settings are compared with the physiological response of certain neuron types in the Ventral Cochlear Nucleus...

More and more electronic systems have components that are not purely digital. Verification of such systems is a much less developed discipline than the digital equivalents and the application of formal (mathematically complete) techniques is a nascent area. In this paper, we will discuss the nature of analog circuit design and describe the way verification is done in practice today. We will des...

The analog-integrated circuits industry is exerting increasing pressure to shorten the analog circuit design time. This pressure is put primarily on the analog circuit designers that in turn demand automated circuit design tools evermore vigorously. Such tools already exist in the form of circuit optimization software packages but they all suffer a common ailment — slow convergence. Even taking...

We present a new synthesis strategy that can automate fully the path from an analog circuit topology and performance specifications to a sized circuit schematic. This strategy relies on asymptotic waveform evaluation to predict circuit performance and simulated annealing to solve a novel unconstrained optimization formulation of the circuit synthesis problem. We have implemented this strategy i...

We present a method of evolving analog electronic circuits using a linear representation and a simple unfolding technique. While this representation excludes a large number of circuit topologies, it is capable of constructing many of the useful topologies seen in hand-designed circuits. Our system allows circuit size, circuit topology, and device values to be evolved. Using a parallel genetic a...