The maximum oscillation frequency (fmax) quantifies the practical upper bound for useful circuit operation. We report here an fmax of 70 GHz in transistors using epitaxial graphene grown on the C-face of SiC. This is a significant improvement over Si-face epitaxial graphene used in the prior high-frequency transistor studies, exemplifying the superior electronics potential of C-face epitaxial g...

in this article the relationship between the amount of seasonal rainfall (autumn, winter and spring) and climate indices in iran have been studied. the climate indices (the southern oscillation(soi),the north atlantic oscillation(nao), arctic oscillation(ao),nino 3/4,the multivariate enso index(mei),trans_ nino index(tni) and the pacific decadal oscillation(pdo) are used as independent variable...

A new sinusoidal oscillator configuration using two second generation current conveyors (CCIIs) is introduced which requires only two grounded capacitors and two resistors. The proposed structure enjoys independent frequency control through grounded resistor. The circuit is extended to electronic tunability regime by replacing CCIIs with second generation current controlled conveyors (CCCIIs). ...

An interpretation of high-frequency (20–2400 Hz) fast quasiperiodic oscillations of magnetars in terms of an equivalent electric circuit is given. Observed periods and the very high quality of quasi-periodic oscillations are explained. The oscillation source is represented as a hot electron-positron plasma in a ‘trapped fireball’, a system of current-carrying magnetic loops of various sizes. Th...

Shorts and opens are the most common types of defects in today’s CMOS ICs. In this paper we show for the first time that an open in the interconnect wiring of a digital CMOS circuit can cause oscillation or sequential behavior. We also analyze and compare the factors affecting the probabilities for an interconnect open and a feedback bridging fault to oscillate or display sequential behavior.

We propose a flexible scheme based on three coupled optical microcavities that permits us to achieve stable oscillations in the microwave range, the frequency of which depends only on the cavity coupling rates. We find that the different dynamical regimes (soft and hard excitation) affect the oscillation intensity, but not their periods. This configuration may permit us to implement compact hyp...

A self-consistent theoretical treatment of a triple-well atomtronic transistor circuit reveals the mechanism gain, conditions oscillation, and properties subsequent coherent matter waves emitted by circuit. Bose-condensed reservoir atoms in large source well provides chemical potential that drives dynamics. The theory is based on ansatz condensate arises gate as displaced ground state, is, one ...

Manuscript received June 16, 1999. Manuscript revised August 14, 1999. † The authors are with the Department of Electrical Engineering, Science University of Tokyo, Noda-shi, 278-8510 Japan. SUMMARY A lower impedance terminal is necessary for an input terminal of current-mode circuits and an output terminal of voltage-mode circuits to reduce an error and distortion in analog signal processing. ...

usually both ends of a transformer winding are at the same side of the magnetic core. with this arrangement there are automaticaly the same number of the turns for each winding in both core windows next to the middle leg of a three phase three leg core type transformer. contrary to this arrangement it is possible to put the two ends of a winding at the different sides of the core. in this case ...

The mechanism of cycle length oscillation and its role in spontaneous termination of reentry was studied in an in vitro preparation of canine atrial tissue surrounding the tricuspid orifice. Reentry occurred around a fixed path with incomplete recovery of excitability. Among 18 experiments, there was complete concordance between the occurrence of spontaneous cycle length oscillation and spontan...