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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 concept of a new HVDC circuit breaker for 500 kV and its operating principle are explained, and the interruption of the direct current is based on a "passive" commutation circuit.
Abstract: The concept of a new HVDC circuit- breaker for 500 kV and its operating principle are explained. The interruption of the direct current is based on a "passive" commutation circuit.

68 citations

Journal ArticleDOI
TL;DR: In this article, a readout circuit for a passive telemetric intra-ocular pressure (IOP) sensor is developed, which consists of a capacitive pressure sensor in parallel with a planar coil.
Abstract: A readout circuit for a passive telemetric intra-ocular pressure (IOP) sensor is being developed. The intra-ocular sensor consists of a capacitive pressure sensor in parallel with a planar coil. This inductor–capacitor (LC) resonant circuit transduces the pressure into a shift of resonance frequency. A voltage controlled oscillator (VCO) is used to excite the sensor over a large frequency range (20–40 MHz), hereby detecting resonance of the internal sensor, and thus enabling the measurement of the intra-ocular pressure. This low power circuit is extremely compact, making it suitable for long-term ambulant patient monitoring. The circuit allows wireless readout of the smallest pressure transducers. Tests show promising results at mutual coil distances up to 7.5 mm.

68 citations

Patent
06 Jun 1995
TL;DR: In this article, an improved ballast circuit for use with a compact fluorescent lamp includes an EMI filter, a rectifier and voltage amplification stage, an active resonant circuit and power factor correction stage which is connected in parallel to a lamp load.
Abstract: An improved ballast circuit for use with a compact fluorescent lamp includes an EMI filter, a rectifier and voltage amplification stage, an active resonant circuit and power factor correction stage which is connected in parallel to a lamp load. The ballast circuit includes a feedback capacitor which provides a feedback path for a portion of the high frequency current to the rectifier and voltage amplification stage. The feedback capacitor of the improved ballast circuit reduces the non-linear characteristics of the diode, thus providing almost a linear load on the input power supply and therefore achieving an improved power factor, on the order of 0.95 or greater. The improved ballast circuit may also include a dimming stage which works with the active resonant circuit to vary the amount of power that is supplied to the lamp load. The dimming stage does not require the addition of parasitic active stages and thus provides a lamp with high electrical efficiency.

68 citations

Patent
15 Feb 2005
TL;DR: In this paper, a power transmitter where a primary transmission coil L1 and a secondary reception coil L2 are magnetically coupled with each other and which transmits power without contacts and in non-contact, a capacitor C1 is connected in series to the primary transmission coils L1 so as to invert and boost the voltage to be supplied to the PLS.
Abstract: PROBLEM TO BE SOLVED: To provide a power transmitter and a power transmission method which can accomplish the power transmission efficiency on a high practice level and can easily materialize the downsizing and power saving by the high power transmission efficiency SOLUTION: In the power transmitter where a primary transmission coil L1 and a secondary transmission coil L2 are magnetically coupled with each other and which transmits power without contacts and in non-contact from the primary transmission coil L1 to the secondary reception coil L2, a capacitor C1 is connected in series to the primary transmission coil L1 so as to invert and boost the voltage to be supplied to the primary transmission coil L1, and also a series resonance circuit 7 including the mutual inductance M by the secondary reception coil L2, and the resonance point of the series resonace circuit 7 including the mutual inductance M by the secondary reception coil L2 is set to frequency higher than that at the resonance point of the primary series circuit 6 consisting of the primary transmission coil L1 and the capacitor C1 COPYRIGHT: (C)2006,JPO&NCIPI

68 citations

Patent
17 Dec 2001
TL;DR: In this paper, a comb-line electrode is used to provide an electrode structure of a tag for RFID (radio frequency identification) by which a resonance frequency of a resonant circuit can be easily adjusted after formation of the circuit and a method for adjusting the resonance frequency using the electrode.
Abstract: PROBLEM TO BE SOLVED: To provide an electrode structure of a tag for RFID (radio frequency identification) by which a resonance frequency of a resonant circuit to be formed on the tag for RFID can be easily adjusted after formation of the circuit and a method for adjusting the resonance frequency using the electrode. SOLUTION: In an RFID system for communicating data between a reader/ writer and the tag by using electromagnetic induction, a comb-line electrode 7 of a capacitor constituting the resonant circuit of the tag and a counter electrode 8 to be formed on the opposite side by sandwiching a substrate are formed so that area of an overlapped part between each finger 7b of the comb-line electrode 7 and the counter electrode 8 gradually becomes small from the tip side to the root side of the comb-line electrode 7, for example, the counter electrode 8 is formed like a taper and shift quantity of the resonance frequency when the fingers 7b are successively cut off is set as approximately equivalent values. Thus, the number of fingers to be cut off is directly determined from the shift quantity from desired resonant frequency and an adjustment work of the resonant frequency is facilitated. COPYRIGHT: (C)2003,JPO

68 citations


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