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RLC circuit

About: RLC circuit is a research topic. Over the lifetime, 14490 publications have been published within this topic receiving 142697 citations.


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Patent
08 Jan 2009
TL;DR: In this paper, a radio IC device includes an electromagnetic coupling module including a feeder circuit substrate on which the radio IC chip is mounted, and two radiation plates, one of which faces and is magnetically coupled to the inductance element.
Abstract: An antenna includes a feeder terminal and a resonance circuit. The resonance circuit is defined by a capacitance element and an inductance element and includes first and second radiation plates. The capacitance element is electromagnetically coupled to the first radiation plate, and the inductance element is electromagnetically coupled to the second radiation plate. A radio IC device includes an electromagnetic coupling module including a feeder circuit substrate on which a radio IC chip is mounted, and radiation plates. The feeder circuit substrate includes an inductance element and a capacitance element. One of the radiation plates faces and is magnetically coupled to the inductance element. The other radiation plate faces and is electrically coupled to the capacitance element. The radio IC chip is operated by signals received by the radiation plates, and a response signal from the radio IC chip is radiated from the radiation plates.

86 citations

Journal ArticleDOI
A. Dec1, K. Suyama
TL;DR: In this article, a 1.9 GHz CMOS voltage-controlled oscillator with tunable capacitors and a bonding wire inductor has been presented, where the resonant circuit consists of micromachined electromechnically tunably tuned capacitors, and the active circuits were fabricated in a 0.5/spl mu/m CMOS process.
Abstract: This paper presents a 1.9-GHz CMOS voltage-controlled oscillator (VCO) where the resonant circuit consists of micromachined electromechnically tunable capacitors and a bonding wire inductor. The tunable capacitors were implemented in a MUMP's polysilicon surface micromachining process. These devices have a nominal capacitance of 2.1 pF and a quality factor (Q-factor) of 9.3 at 1.9 GHz. The capacitance is variable from 2.1 pF to 2.9 pF within a 4-V control, voltage range. The active circuits were fabricated in a 0.5-/spl mu/m CMOS process. The VCO was assembled in a ceramic package where the MUMP's and CMOS dice were bonded together. The experimental VCO achieves a phase noise of -98 dBc/Hz and -126 dBc/Hz at 100 kHz and 600 kHz offsets from the carrier, respectively. The tuning range of the VCO is 9%. The VCO circuit and the output buffer consume 15 mW and 30 mW from a 2.7-V power supply, respectively.

86 citations

Journal ArticleDOI
TL;DR: Some generalized fundamentals for fractional-order RLβCα circuits as well as a gradient-based optimization technique in the frequency domain, which provides new fundamentals and can be used for better interpretation or best fit matching with experimental results.
Abstract: This paper introduces some generalized fundamentals for fractional-order RL β C α circuits as well as a gradient-based optimization technique in the frequency domain. One of the main advantages of the fractional-order design is that it increases the flexibility and degrees of freedom by means of the fractional parameters, which provide new fundamentals and can be used for better interpretation or best fit matching with experimental results. An analysis of the real and imaginary components, the magnitude and phase responses, and the sensitivity must be performed to obtain an optimal design. Also new fundamentals, which do not exist in conventional RLC circuits, are introduced. Using the gradient-based optimization technique with the extra degrees of freedom, several inverse problems in filter design are introduced. The concepts introduced in this paper have been verified by analytical, numerical, and PSpice simulations with different examples, showing a perfect matching.

86 citations

Journal ArticleDOI
TL;DR: In this paper, the authors present a guide for the design and construction of a helical coil resonator for a desired frequency that maximises the quality factor for a set of experimental constraints.
Abstract: Ions confined using a Paul trap require a stable, high voltage and low noise radio frequency (RF) potential. We present a guide for the design and construction of a helical coil resonator for a desired frequency that maximises the quality factor for a set of experimental constraints. We provide an in-depth analysis of the system formed from a shielded helical coil and an ion trap by treating the system as a lumped element model. This allows us to predict the resonant frequency and quality factor in terms of the physical parameters of the resonator and the properties of the ion trap. We also compare theoretical predictions with experimental data for different resonators, and predict the voltage applied to the ion trap as a function of the Q-factor, input power and the properties of the resonant circuit.

86 citations

Journal ArticleDOI
TL;DR: In this paper, the authors proposed a novel retrofit approach for dual-functional energy harvesting and robust vibration control by integrating the tuned mass damper (TMD) and electromagnetic shunted resonant damping.
Abstract: This paper proposes a novel retrofittable approach for dual-functional energy-harvesting and robust vibration control by integrating the tuned mass damper (TMD) and electromagnetic shunted resonant damping. The viscous dissipative element between the TMD and primary system is replaced by an electromagnetic transducer shunted with a resonant RLC circuit. An efficient gradient based numeric method is presented for the parameter optimization in the control framework for vibration suppression and energy harvesting. A case study is performed based on the Taipei 101 TMD. It is found that by tuning the TMD resonance and circuit resonance close to that of the primary structure, the electromagnetic resonant-shunt TMD achieves the enhanced effectiveness and robustness of double-mass series TMDs, without suffering from the significantly amplified motion stroke. It is also observed that the parameters and performances optimized for vibration suppression are close to those optimized for energy harvesting, and the performance is not sensitive to the resistance of the charging circuit or electrical load.

86 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202379
2022173
2021277
2020465
2019550
2018558