In this paper, explicit amplitude and frequency expressions for a Cellular Neural Network with an Opposite-Sign Template (CNN-OST) under oscillation condition are derived and a novel inductorless oscillator circuit with negative feedbacks, based on this simple structure is designed and implemented. The system is capable of generating quasi-sine signals with tuneable amplitude and frequency whic...

........................................................................................................ iii Acknowledgement ..........................................................................................v Table of contents ........................................................................................... vi List of figures ......................................................

We have observed the coherent exchange of a single energy quantum between a flux qubit and a superconducting LC circuit acting as a quantum harmonic oscillator. The exchange of an energy quantum is known as the vacuum Rabi oscillation: the qubit is oscillating between the excited state and the ground state and the oscillator between the vacuum state and the first excited state. We also show tha...

The second order universal voltage-mode filter using voltage differencing differential difference amplifiers (VDDDAs) has been proposed. It has high input impedance voltage-mode biquad filter with orthogonal tune of natural frequency and quality factor. The proposed filter simultaneously provides five filter responses: low-pass (LP), high-pass (HP), band-reject (BR), all-pass (AP) and band-pass...

The failure of the CMOS Schmitt-trigger inverter open-fault and capacitor in case a oscillator circuit cause self-oscillation device. It leads to high frequency be emitted on output side, because balance internal smaller parasitic capacitance approximately 5 – 20 pF. In this article, reduction is presented, by adding between Gate pin Drain Q1 demonstration illusion an equivalent circuit. This c...

An experimental method for generating homoclinic oscillations using two nonidentical Chua’s oscillators coupled in unidirectional mode is described here. A homoclinic oscillation is obtained at the response oscillator in the weaker coupling limit of phase synchronization. Different phase locking phenomena of homoclinic oscillations with external periodic pulse have been observed when the freque...

~250 Words) Circuits of emotion comprise a multitude of subcortical and cortical structures of the primate brain, and can be conceptualized as a series of nested circuits. The core circuit of emotion contains structures that are mainly subcortical and phylogenetically older. These structures initiate autonomic and motor responses associated with the expression of emotion. Changes in attention a...

Properties of carbachol-induced oscillatory activity in rat hippocampus. J. Neurophysiol. 78: 2631-2640, 1997. The recent resurgence of interest in carbachol oscillations as an in vitro model of theta rhythm in the hippocampus prompted us to evaluate the circuit mechanisms involved. In extracellular recordings, a regularly spaced bursting pattern of field potentials was observed in both CA3 and...

BACKGROUD AND OBJECTIVES The high frequency oral oscillation therapy (HFOO) is carried through a plastic device which promotes the clearance of pulmonary sputum. This possesses a metallic sphere which, oscillates during the expiration, generating oscillatory positive expiratory pressure. The aim of this study was to verify the performance of the national device of HFOO (Shaker, NCS, São Paulo) ...