We propose a scheme to obtain highly sensitive oscillators in coupled-resonator system with an exceptional point of degeneracy (EPD) and small instability. The oscillator the is realized by using two coupled resonators almost balanced small-signal gain loss, that saturates due nonlinear effects active component, resulting oscillation frequency very perturbation circuit. Two cases are investigat...

Underlying physical mechanisms controlling the noise properties of oscillators are studied. This treatment shows the importance of inductance selection for oscillator noise optimization. A design strategy centered around an inductance selection scheme is executed using a practical graphical optimization method to optimize phase noise subject to design constraints such as power dissipation, tank...

An injection-locked ring oscillator-based phase-locked-loop targeting clock recovery for space application at 3.2 GHz is presented here. Most circuits need a very low phase noise and jitter performance are thus based on LC-type oscillators. These excellent performances come the expense of poor integration density. To alleviate this issue, work introduces an PLL circuit. The combination injectio...

Oscillators are an artefact of Electrical Technology. By and large oscillator designing can be viewed as a ‘Scientific Art’. Furthermore, the use of computer in the designing process of oscillator added the wings to it. FuzzyLogic-Computer-Aided-Design (FLCAD) using MATLAB FUZZY TOOLBOX amalgamates the ability of Fuzzy Logic to model colloquial propositions involved in the oscillator design. De...

by Yang Zhang, M.S. Washington State University December 2007 Chair: Deukhyoun Heo This thesis presents novel designs of low-phase-noise 0.18μm CMOS LC voltage controlled oscillator (VCO) and quadrature VCO (QVCO) for 5-6GHz wireless communications applications. Using a new capacitor tapping technique, the phase noise of CMOS LC oscillators is lowered based on the improvement of loaded-Q improv...

In this paper we present a study on the design optimization of voltage-controlled oscillators. The phase noise of LC-type oscillators is basically limited by the quality factor of inductors. It has been experimentally shown that higher-Q inductors can be achieved at higher frequencies while the oscillation frequency is limited by parasitic capacitances. In this paper, the minimum transistor siz...

This paper presents the design and the implementation of a fully monolithic coupledoscillator array, operating at 6 GHz with close to zero coupling phase, in 0.25 μm BICMOS SiGe process. This array is made of four LC-NMOS differential VCOs coupled through a resistor. The single LC-NMOS VCO structure is designed and optimized in terms of phase noise with a graphical optimization approach while s...

We describe theoretically the quantum properties of a type-II Optical Parametric Oscillator containing a birefringent plate which induces a linear coupling between the orthogonally polarized signal and idler beams and results in phase locking between these two beams. As in a classical OPO, the signal and idler waves show large quantum correlations which can be measured experimentally due to the...