RLC circuit

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

RLCSYN: RLC Equivalent Circuit Synthesis for Structure-Preserved Reduced-order Model of Interconnect

Abstract: This paper aims to explore RLC equivalent circuit synthesis method for reduced-order models of interconnect circuits obtained by Krylov subspace based model order reduction (MOR) methods. To guarantee pure RLC equivalent circuits can be synthesized for the reduced-order models, both the structures of input and output incidence matrices and the block structure of the circuit matrices should be preserved in the reduced-order models. Block structure preserving MOR methods such as SPRIM (Freund, 2004) and SAPOR (Su et al., 2004) have been well established. In this paper, an embeddable input-output structure preserving order reduction (IOPOR) technique was proposed to further preserve the structures of input and output incidence matrices in the reduced-order models. By combining block structure preserving MOR methods and IOPOR technique, an RLC equivalent circuit synthesis method RLCSYN (RLC SYNthesis) was developed. Inline diagonalization and regularization techniques are specifically proposed to enhance the robustness of inductance synthesis. The pure RLC model, high modeling accuracy, passivity guaranteed property and SPICE simulation robustness make RLCSYN more applicable in interconnect analysis, either for digital IC design or mixed signal IC simulation.

A Novel Control Scheme of Synchronous Buck Converter for ZVS in Light-Load Condition

Abstract: This paper proposes a new control technology that enables a synchronous rectifier (SR) buck converter to realize zero voltage switching (ZVS) in light load condition. The SR control technique is applicable to dc low voltage output because the replacement of output rectifier diode by MOSFET can minimize conduction losses and increase the efficiency of the whole circuit. However, the technique cannot achieve good efficiency in light load condition. The control technique introduced in this paper enables an SR buck converter to carry out ZVS in light load condition to increase efficiency. No extra auxiliary switches or RLC passive components are required; thus, it is low cost and easy to control. The output of buck converter with 5 V/25 W featured by SR is developed in this paper; the availability of the technique introduced, herein, is also proven. The experimental results are satisfactory.

Characterization of miniaturized RLC resonators made of biodegradable materials for wireless implant applications

Abstract: As a first step toward the ultimate goal of making fully biodegradable implants for in vivo operation, miniaturized radio frequency (RF)-driven resistor–inductor–capacitor (RLC) resonators made of biodegradable materials are fabricated and characterized. The resonators made of biodegradable metals (magnesium, iron, Mg- and Fe-alloys) are fabricated by electric discharge machining, while the resonators made of biodegradable conducting polymer composites (polylactide–polypyrrole, PLLA–PPy and poly(ɛ-caprolactone)–polypyrrole, PCL–PPy) are fabricated by compression molding combined with laser-cutting. The unloaded resonant frequency funloaded and unloaded quality factor Qunloaded of the RLC resonators are obtained from capacitive coupling and inductive coupling measurements. funloaded and Qunloaded are found to be 0.5–1 GHz and 8–410 for the metal resonators, and 2.0–3.4 GHz and 6–19 for the polymer resonators, respectively. The RF conductivity and RF relative permeability of the materials used to fabricate the RLC resonators are evaluated from capacitive coupling measurements combined with finite element simulations. Finally, the performance in a human body-like environment is evaluated. Even if largely attenuated, the resonance peak remained detectable with 6 mm of muscle/fat tissue placed between the RLC resonator and the measurements coil, for both metal and polymer resonators. As a conclusion, all the investigated biodegradable materials can be suitable to fabricate passive wireless communication devices for biosensors implanted inside the body. At this state of the research, magnesium is the most promising candidate to fabricate RLC resonators, since it combines high conductivity (high Q) and promising biodegradation properties. Alternatively, the Mg-alloy could be of interest if faster biodegradation and higher mechanical performance of the implant is required. On the other hand, the biodegradable conducting polymers PCL–PPy and PLLA–PPy are also of interest because of their light weight, higher flexibility in the fabrication process, compatibility with magnetic resonance imaging and transparency to X-rays.

Transponder for electromagnetic detection system with non-linear circuit

Abstract: A detection wafer with a non-linear circuit for an electromagnetic detection system wherein two different transmission frequencies are used, comprising a resonant circuit connected to a non-linear element forming from the transmission frequencies, a third frequency to be detected. The non-linear element forms part of an amplifying semiconductor circuit connected to a supply battery and having an input circuit coupled to the resonant circuit, and an output circuit comprising a coil magnetically coupled to the coil of the resonant circuit, the resonant frequency bandwidth of the resonant circuit comprising both transmission frequencies and the frequency to be detected.

Resonant link bidirectional power converter. II. Application to bidirectional AC motor drive without electrolytic capacitor

Abstract: This paper proposes a new power converter which consists of two identical 3-phase PWM modulators and a novel resonant circuit. A new control strategy is integrated to realize the bidirectional power converter without an electrolytic link capacitor. The power flow between converters is bidirectional and the regenerative braking is inherent. The source side currents maintain sinusoidal waveforms with a unity power factor. It is observed in the experiment that by balancing the active power between the source and load side, the voltage across a small ceramic link capacitor can be maintained within a small deviation from the reference. Simulation results and experimental results are presented to verify the operational principles. >