Results 61 to 70 of about 30,784 (218)
Applied Sciences, 2019 This paper proposes a new high-input impedance current feedback operational amplifier (CFOA)- based voltage-mode multifunction biquadratic filter and a voltage-mode quadrature oscillator using the proposed high-input impedance CFOA-based biquadratic ...
San-Fu Wang +3 more
doaj +1 more source
A Noise-Shifting Differential Colpitts VCO [PDF]
, 2002 A novel noise-shifting differential Colpitts VCO is presented. It uses current switching to lower phase noise by cyclostationary noise alignment and improve the start-up condition.
Aparicio, Roberto, Hajimiri, Ali
core
Pulse Generation by On‐Chip Dispersion Compensation at 8 µm Wavelength
Laser &Photonics Reviews, Volume 20, Issue 8, 17 April 2026.This work demonstrates on‐chip pulse generation at 8 μm$\mathrm{\mu}\mathrm{m}$ using chirped Bragg gratings in SiGe graded‐index photonic circuits to compensate the quadratic phase of quantum cascade laser frequency combs. With this approach pulses as short as 1.39 ps were produced, close to the transform limit, representing a key step toward compact,
Annabelle Bricout +17 more
wiley +1 more source
Dynamical two-mode squeezing of thermal fluctuations in a cavity opto-mechanical system
, 2015 We report the experimental observation of two-mode squeezing in the oscillation quadratures of a thermal micro-oscillator. This effect is obtained by parametric modulation of the optical spring in a cavity opto-mechanical system.
Bonaldi, M. +9 more
core +1 more source
ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik, Volume 106, Issue 4, April 2026.ABSTRACT The Duffing oscillator is often considered as “the” prototype of a nonlinear oscillator as it exhibits many characteristic phenomena of nonlinear dynamics. One of these phenomena is the occurrence of multiple periodic solutions as considered here for the case of the harmonically excited slightly damped Duffing oscillator.
Hannes Dänschel +3 more
wiley +1 more source
Quadrature Oscillators Using Operational Amplifiers
Active and Passive Electronic Components, 2011 Two new quadrature oscillator circuits using operational amplifiers are presented. Outputs of two sinusoidal signals with 90° phase difference are available in each circuit configuration.
Jiun-Wei Horng
doaj +1 more source
Mutual first order coherence of phase-locked lasers
, 2003 We argue that (first-order) coherence is a relative, and not an absolute, property. It is shown how feedforward or feedback can be employed to make two (or more) lasers relatively coherent.
Braunstein S L +12 more
core +1 more source
Interaction of a two-level atom with squeezed light [PDF]
, 2006 We consider a degenerate parametric oscillator whose cavity contains a two-level atom. Applying the Heisenberg and quantum Langevin equations, we calculate in the bad-cavity limit the mean photon number, the quadrature variance, and the power spectrum ...
Agarwal +13 more
core +2 more sources
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
openaire +1 more source
A Southern Ocean Multidecadal Oscillator Forced by Deep Convection
Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.Abstract Some climate models exhibit multidecadal‐to‐centennial variability of the Southern Ocean (SO) associated with open‐ocean polynyas and deep convection. We characterize the SO variability of the Community Earth System Model (version 1) under preindustrial conditions run with two different ocean resolutions, low‐resolution (∼1°) and high ...
Robert R. Ford, Brian E. J. Rose
wiley +1 more source