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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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Journal ArticleDOI
TL;DR: In this article, the effects of inductance on repeater insertion in RLC trees are investigated. And the authors propose an algorithm to insert and size repeaters within an RLC tree to optimize a variety of possible cost functions such as minimizing the maximum path delay, the skew between branches, or a combination of area, power, and delay.
Abstract: The effects of inductance on repeater insertion in RLC trees is the focus of this paper. An algorithm is introduced to insert and size repeaters within an RLC tree to optimize a variety of possible cost functions such as minimizing the maximum path delay, the skew between branches, or a combination of area, power, and delay. The algorithm has a complexity proportional to the square of the number of possible repeater positions and determines a repeater solution that is close to the global minimum. The repeater insertion algorithm is used to insert repeaters within several copper-based interconnect trees to minimize the maximum path delay based on both an RC model and an RLC model. The two buffering solutions are compared using the AS/X dynamic circuit simulator. It is shown that as inductance effects increase, the area and power consumed by the inserted repeaters to minimize the path delays of an RLC tree decreases. By including inductance in the repeater insertion methodology, the interconnect is modeled more accurately as compared to an RC model, permitting average savings in area, power, and delay of 40.8%, 15.6%, and 6.7%, respectively, for a variety of copper-based interconnect trees from a 0.25 /spl mu/m CMOS technology. The average savings in area, power, and delay increases to 62.2%, 57.2%, and 9.4%, respectively, when using five times faster devices with the same interconnect trees.

45 citations

Proceedings ArticleDOI
06 Oct 1996
TL;DR: In this article, a novel type of solid-state ballast, which operates in the megahertz-range frequency, is presented in a circuit composed of a voltage-fed half-bridge inverter, a distributed constant line, and a parallel LC resonant circuit.
Abstract: A novel type of solid-state ballast, which operates in the megahertz-range frequency, is presented in this paper. A circuit composed of a voltage-fed half-bridge inverter, a distributed constant line, and a parallel LC resonant circuit has been developed for this purpose. The high-intensity discharge (HID) lamp is connected to the output terminal of the inverter through the distributed constant line. Here, since the length of the line is adjusted to 1/4 of the propagation wavelength /spl lambda/, the output voltage of the voltage-fed inverter can be converted to a current source on the load side. Based on the experiment results, the ballast appears to be able to supply not only high voltage, but also constant current for ignition of the HID lamp. The experimental results from a prototype system are used to verify the theoretical procedure.

45 citations

Journal ArticleDOI
02 Mar 2004
TL;DR: This proposal changes the frequency of current variations away from the resonance band to a non-resonant frequency to be absorbed by the power supply, because inductive noise is a resonance problem.
Abstract: Inductive noise in high-performance microprocessors is a reliabilityissue caused by variations in processor current (di/dt)which are converted to supply-voltage glitches by impedances inthe power-supply network. Inductive noise has been addressed byusing decoupling capacitors to maintain low impedance in thepower supply over a wide range of frequencies. However, evenwell-designed power supplies exhibit (a few) peaks of high impedanceat resonant frequencies caused by RLC resonant loops. Previousarchitectural proposals adjust current variations bycontrolling instruction fetch and issue, trading off performanceand energy for noise reduction. However, the proposals do notconsider some conceptual issues and have implementation challenges.The issues include requiring fast response, responding tovariations that do not threaten the noise margins, or respondingto variations only at the resonant frequency while the range ofhigh impedance extends to a resonance band around the resonantfrequency. While previous schemes reduce the magnitude of variations,our proposal, called resonance tuning, changes the frequencyof current variations away from the resonance band to anon-resonant frequency to be absorbed by the power supply.Because inductive noise is a resonance problem, resonance tuningreacts only to repeated variations in the resonance band, andnot to isolated variations. Reacting after a few repetitions allowsmore time for the response and reduces unnecessary responses,decreasing performance and energy loss.

45 citations

Journal ArticleDOI
TL;DR: In this paper, two quasi-resonant dc-link (QRDCL) inverter topologies are discussed for motor-friendly application, and a new motorfriendly QRDCL inverter with lossless variable zero-voltage duration is proposed.
Abstract: Two quasi-resonant dc-link (QRDCL) inverter topologies are discussed for motor-friendly application. For the control of an inverter, a modified space-vector pulsewidth modulation is implemented, which requires only two resonant cycles per switching period and helps in better utilization of dc-link voltage. The first topology is tested experimentally with a 34-m-long cable connected between inverter and induction machine for reduced voltage overshoot at motor-side cable end and common-mode (CM) voltage. Even though results are satisfying, a freewheeling interval of this topology produces high losses. So a new motor-friendly QRDCL inverter with lossless variable zero-voltage duration is proposed. In this topology, during a zero-voltage interval, energy is stored in a capacitor rather than an inductor. No current is freewheeling through inverter switches, and it clearly helps in reducing the losses under a low-modulation index region. Simulation results are presented to verify the validity of the proposed inverter and its motor-friendly characteristics.

45 citations

Patent
28 Jul 1997
TL;DR: In this paper, a primary inductive path to which a high-frequency current is supplied from a power supply is laid along a guide rail for carrying car bodies and secondary electric power receiving circuit for receiving electric power from the primary induction path in a contactless mode are disposed in the car bodies.
Abstract: A primary inductive path to which a high-frequency current is supplied from a power supply is laid along a guide rail for carrying car bodies and secondary electric power receiving circuit for receiving electric power from the primary inductive path in a contactless mode are disposed in the car bodies. Inductance in the primary inductive path is adjusted by disposing, in the power supply, a dummy inductor which is composed by overlapping a plurality of planar ferrite cores with gaps reserved so as to form a plurality of ferrite blocks and combining these ferrite blocks so as to form at centers thereof a run-through slot for passing the primary inductive path. Further, the secondary electric power receiving circuit is composed of a pick-up coil in which an electromotive force is generate by a magnetic flux produced by the primary inductive path, a capacitor which composes, together with the pick-up coil, a resonant circuit resonating with a frequency in the primary inductive path, a rectifier circuit connected to the capacitor, and a constant-voltage control circuit which is connected to the rectifier circuit and controls an output voltage to a standard voltage, and uses standard voltage generators which set the standard voltage of the constant-voltage control circuit at two steps in proportion to a load electric power as well as a controller for switching the standard voltage generators.

45 citations


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