Results 51 to 60 of about 1,826 (183)
Approach for third order quadrature oscillator realisation
IET Circuits, Devices & Systems, 2015 This paper presents a new approach for third order quadrature oscillator (QO) realisation. It uses a high pass filter and differentiator connected in a feedback loop. A differential voltage current conveyor transconductance amplifier (DVCCTA) is employed to verify the proposed approach. Two circuit topologies of QO have been proposed.
Neeta Pandey, Rajeshwari Pandey
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Advanced Physics Research, Volume 5, Issue 7, July 2026.ABSTRACT We introduce a family of bosonic quantum error‐correcting codes built as a rotation‐symmetric superposition of squeezed vacuum states, which promise protection against both loss and dephasing noise channels. The robustness of these “squeezed‐vacuum codes” arises from being arranged at evenly spaced angles in phase‐space, and simultaneously in ...
Nir Gutman +4 more
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Advanced Physics Research, Volume 5, Issue 7, July 2026.Active reactance in electro‐thermal memristors emerges intrinsically from rapid thermal switching of device resistance, linking current‐controlled and voltage‐controlled negative differential resistance to neuronal spiking dynamics. Opposing temperature coefficients of resistance give rise to active inductive or capacitive responses, enabling tunable ...
Fatme Jardali +4 more
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Quantum backaction evading measurements of a silicon nitride membrane resonator
New Journal of Physics, 2022 Quantum backaction disturbs the measurement of the position of a mechanical oscillator by introducing additional fluctuations. In a quantum backaction measurement technique, the backaction can be evaded, although at the cost of losing part of the ...
Yulong Liu +3 more
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A self-correcting quadrature voltage controlled oscillator
IEICE Electronics Express, 2014 A self-correcting quadrature voltage controlled oscillator (QVCO) with phase correcting loop is proposed. It comprises the QVCO core and phase correcting loop, which corrects the quadrature phase error. Two LC VCOs, buffers, and phase shifters are coupled in circular configuration to achieve IQ symmetry. This paper introduces the idea of realizing QVCO
Tomoyuki Arai, Ali Hajimiri
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Affine hypersurfaces and superintegrable systems
Journal of the London Mathematical Society, Volume 114, Issue 1, July 2026.Abstract It was recently shown that under mild assumptions, second‐order conformally superintegrable systems can be encoded in a (0,3)‐tensor, called structure tensor. For abundant systems, this approach led to algebraic integrability conditions that essentially allow one to restore a system from the knowledge of its structure tensor in a point on the ...
Vicente Cortés, Andreas Vollmer
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Observing the Earth's Plasmasphere and Ionosphere From the Lunar Surface
Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.Abstract We present the analysis of the first lunar‐based observational characterization of the Earth's plasmasphere and ionosphere using Global Navigation Satellite Systems signals tracked from the lunar surface by the Lunar GNSS Receiver Experiment (LuGRE). The Earth‐Moon geometry enables limb sounding of the plasmasphere at altitudes exceeding 3,000
C. Cesaroni +8 more
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Current-Mode Quadrature Oscillator Simple Designs
Journal of Low Power Electronics and ApplicationsSimple designs of current-mode quadrature oscillators are presented in this work. The main achievement, with regards to the literature, is the minimization of the required transistor count accomplished by the utilization of a suitable lossless ...
Julia Nako +2 more
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Time‐Resolved SNOM via Phase‐Domain Sampling
Nanophotonics, Volume 15, Issue 12, 25 June 2026.Time‐resolved scanning near‐field optical microscopy (tr‐SNOM) grants access to the dynamic dielectric function of monolayer and multilayer WS2, using visible wavelengths. In order to use a femtosecond laser with a repetition rate of 200 kHz, the signal is sampled and demodulated in the modulation phase domain, marking the first realization of tr‐SNOM ...
Philipp Schwendke +2 more
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Sinusoidal and Relaxation Wide Range Voltage Controlled Oscillators
Communications, 2015 This paper presents a sinusoidal Wien-bridge and square wave wide range voltage controlled oscillators. The square wave oscillator is based on relaxation (Schmitt trigger) topology.
Milan Stork
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