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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
02 Jul 1999
TL;DR: In this article, a non-contact type IC card containing regulating capacitor and resistor to regulate a sharpness of a resonance circuit by regulating a resistance value in the circuit and a method for regulating its antenna characteristics.
Abstract: PROBLEM TO BE SOLVED: To provide a non-contact type IC card containing regulating capacitor and resistor to regulate a sharpness of a resonance circuit by regulating a resistance value in the circuit and a method for regulating its antenna characteristics. SOLUTION: This non-contact type IC card communicates with an external reader/writer in a non-contact manner. In this case, the IC card has a resonance circuit having an antenna coil 13 and a planar regulating resistor in a card base, and can assure a good communicating state by regulating a sharpness Q of the circuit by regulating a resistance value of the regulating resistor 14 in the circuit. A regulating capacitor 15 is provided, and a resonance frequency (f) can be regulated. Antenna characteristic regulation of the IC card can be conducted by regulating the sharpness Q by cutting a part of a plurality of the circuits provide by branching from the antenna coil. COPYRIGHT: (C)2001,JPO

33 citations

Patent
Dongjo Park1, Sojung Jung1
26 Sep 2014
TL;DR: In this paper, a touch sensing system includes a pen including a resonant circuit embedded therein, XY electrodes including X electrodes and Y electrodes perpendicular to the X electrodes, an antenna surrounding the XY electrodes, and a first touch driving circuit which transmits a resonance inductive signal to the pen through electric coupling and to receive a resonance signal from a pen through the antenna.
Abstract: A touch sensing system includes a pen including a resonant circuit embedded therein, XY electrodes including X electrodes and Y electrodes perpendicular to the X electrodes, an antenna surrounding the XY electrodes, and a first touch driving circuit which transmits a resonant inductive signal to the pen through electric coupling and to receive a resonance signal from the pen through the antenna.

33 citations

Journal ArticleDOI
TL;DR: The theory of simple yet unconventional double ladder circuit that exhibits a special degeneracy condition referred to as a degenerate band edge (DBE) is developed, providing insight into the very complex behavior near degeneracy points in periodic circuits.
Abstract: A conventional periodic LC ladder circuit forms a transmission line that has a regular band edge between a passband and a stopband. Here for the first time, we develop the theory of simple yet unconventional double ladder circuit that exhibits a special degeneracy condition referred to as a degenerate band edge (DBE). The degeneracy occurs when four independent eigenstates coalesce into a single eigenstate at the DBE frequency. In addition to possible practical applications, this circuit may provide insight into DBE behavior that is not clear in more complex systems. We show that double ladder resonators exhibit unusual behavior of the loaded quality factor near the DBE, leading to a stable resonance frequency against load variations. These two properties in the proposed circuit are superior to the analogous properties in single ladder circuits. Our proposed analysis leads to analytic expressions for all circuit quantities thus providing insight into the very complex behavior near degeneracy points in periodic circuits. Interestingly, here we show for the first time That a DBE is obtained with unit cells that are symmetric along the propagation direction. The proposed theory of double ladders presented here has potential applications in filters, couplers, oscillators, and pulse shaping networks.

33 citations

Patent
Gyun Chae1, Beom Gu Kang1, Bong Chool Kim1
01 Jul 2002
TL;DR: In this paper, an apparatus of a sustain driver in an AC-type plasma display panel having an energy recovery unit, comprising: a first drive unit for driving one electrode of a panel capacitor to a sustain voltage or a ground voltage; a second drive unit was used to drive another electrode of the panel capacitance to a sustaining voltage or ground voltage.
Abstract: Disclosed is an apparatus of a sustain driver in an AC-type plasma display panel having an energy recovery unit, comprising: a first drive unit for driving one electrode of a panel capacitor to a sustain voltage or a ground voltage; a second drive unit for driving another electrode of the panel capacitor to a sustain voltage or a ground voltage; and a common energy recovery unit. The common energy recovery unit includes: an inductor connected to the one electrode of the panel capacitor and form a L-C resonance circuit with the panel capacitor; a first and second external capacitors connected in series between the power source of the sustain voltage and the ground; and a switch unit for selectively switching the L-C resonance circuit and the first and second external capacitors during the charge and discharge operation of the panel capacitor.

33 citations

Patent
Akiyoshi Uchida1
07 Sep 2012
TL;DR: In this paper, variable information with which a resonance frequency of a resonance circuit of an equipment device having maximum charging power as the power transmitting frequency was transmitted to each equipment device was obtained.
Abstract: In a non-contact charging method, variable information with which a resonance frequency of a resonance circuit of an equipment device having maximum charging power as the power transmitting frequency, and a resonance frequency or a Q value of a resonance circuit of a power receiving unit of an equipment device other than the equipment device having the maximum charging power as a resonance frequency or a Q value for charging depending on each charging power, and transmits to each equipment device variable information corresponding to each equipment device.

33 citations


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