Dynamic voltage and frequency scaling (DVFS) is a powerful technique to reduce power consumption in a chip multiprocessor (CMP). To support DVFS in the multicore power delivery network, we integrate on-chip switched-capacitor (SC) DC-DC converters that can work with multiple conversion ratios to provide varying levels of Vdd supplies. We study the application of such SC converters in multicore ...

High-performance and low-power are the two main criteria in modern digital design. Level converters are important to transfer low voltage input swing signal among the circuits operating at different voltages to get high voltage output swing signal. Previously feedback level converters suffer from short circuit power and long propagation delay. Multi Vth level converters and multiple supply volt...

| Since the first demonstration of a comparatorbased switched-capacitor circuit, analog-to-digital (A/D) converters based on virtual ground detection have made steady and significant progress. Comparators have been replaced by zero-crossing detectors, leading to the development of zerocrossing based circuits for faster speed and lower power. All facets of performance including the sampling rate...

This paper explores the prefix operation on a message-passing fully connected multicomputer with multiport postal communication. We present an exact communication lower bound for the prefix operation on the model. Two efficient parallel prefix algorithms are also presented; they are optimal in terms of the number of communication steps. For an input of size n, one of the algorithms using n proc...

this case weakly causal systems can be used. We will not go into Multiport Approach to Multiple-Fault Location in this any further and we refer to [4] for the details. Analog Circuits The estimator (4) which has been built based on the matrix K(s), constructed above, can be implemented as a Roesser model again and then we have obtained an estimator for R,, in the model (1). J. A. STARZYK AND J....

We report the realization of a three-path Mach-Zehnder interferometer using single-mode fibers and two integrated 3 x 3 fiber couplers. We observed enhanced phase sensitivity, as compared with two-path interferometers, with a visibility of the interference pattern of more than 97%. This interferometer has an analog in two-photon interferometry, and we believe it to be the first nontrivial examp...

We discuss the symmetric multiport and show in a constructive way how it can be decomposed into a set of beam splitters. Based on the decomposition we estimate the number of beam splitters needed. It is shown, that for more than three input ports the number of beam splitters needed is less than the number indicated by the standard decomposition scheme. y Also with the Academy of Finland.