Topic
Parasitic capacitance
About: Parasitic capacitance is a research topic. Over the lifetime, 10029 publications have been published within this topic receiving 110331 citations.
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Patent•
13 May 1991
TL;DR: In this article, a variable-capacitance transducer detects the angular position of a rotatable member by using a dielectric element mounted on the rotatable part.
Abstract: A variable-capacitance transducer detects the angular position of a rotatable member. The transducer includes a first capacitance plate having a plurality of electrically conductive capacitance electrodes, a second capacitance plate spaced therefrom, and a dielectric element located between the plates. At least two of the electrodes are interconnected by a conductive trace. The dielectric element or one of the plates is fixedly mounted on the rotatable member. The electrodes on the first capacitance plate, in conjunction with the second capacitance plate, form a plurality of capacitances that vary as the angular position of the rotatable member changes. A conductive guard partially envelopes the conductive trace and a conductive guard partially envelopes the electrodes on the first capacitive plate. A spacer defines the distance between the capacitance plates and has a coefficient of thermal expansion and dimensions that cause the distance between the capacitance plates to vary by an amount calculated to compensate for changes in plate area with temperature. The transducer includes a parasitic capacitor plate having a position that is adjustable to compensate for parasitic capacitance. An electromagnetic shield is constructed and positioned, with respect to a driver that controls the rotatable member, such that the shield tends to prevent electromagnetic radiation from the driver from affecting the capacitances between the capacitance plates.
37 citations
TL;DR: In this paper, the negative-capacitance transient effect in a ferroelectric HfZrO2 (FE-HZO) capacitor and an equivalent circuit model based on the Landau-Khalatnikov (LK) theory was developed.
Abstract: We have experimentally observed the negative-capacitance transient effect in a ferroelectric HfZrO2 (FE-HZO) capacitor and developed an equivalent circuit model based on the Landau–Khalatnikov (LK) theory. By considering multiple domains (MD) and domain interaction, an MD-LK model precisely reproduced the experimental dynamic characteristics in an FE-HZO capacitor with the various input voltage amplitude and external resistance. The MD-LK model was successfully validated as a dynamic model for FE-HZO capacitor. The MD-LK model is highly expected as a useful simulation model for the dynamic NCFET with a multi-domain FE-HZO gate insulator.
37 citations
TL;DR: In this paper, a method for five-step (pad-pad short-pad open-short-open) on-chip parasitic de-embedding is presented, which is verified by gate electrode resistance and input capacitance of transistors based on 45nm CMOS process.
Abstract: We present the method for five-step (pad-pad short-pad open-short-open) on-chip parasitic de-embedding. Its validation is verified by gate electrode resistance and input capacitance of transistors based on 45 -nm CMOS process. Optimized dummy structures to remove the parasitic components due to the pad and routing metal are proposed. Parameters extracted by the proposed method have excellent physical and theoretical trends.
37 citations
Patent•
28 Aug 1984
TL;DR: Signal conditioning circuitry for a three plate capacitive pressure transducer eliminates the effects of parasitic capacitance in the transducers output, to provide a true indication of sensed pressure magnitude as an electrical signal equivalent of the instantaneous value of only the pressure responsive capacitance as discussed by the authors.
Abstract: Signal conditioning circuitry for a three plate capacitive pressure transducer eliminates the effects of parasitic capacitance in the transducer's output, to provide a true indication of sensed pressure magnitude as an electrical signal equivalent of the instantaneous value of only the pressure responsive capacitance of the transducer.
37 citations
TL;DR: In this paper, a shaft voltage mitigation method according to change in parasitic capacitances of a permanent magnet synchronous motor was proposed, and the rotor-to-winding was determined as an appropriate parameter to mitigate the shaft voltage among the parasitic capacities.
Abstract: This study proposes the shaft voltage mitigation method according to change in parasitic capacitances of a permanent magnet synchronous motor. To consider the shaft voltage reduction in the initial motor design process without any filter, the parasitic capacitances affecting the shaft voltage are calculated using the motor geometry parameters. Then, the shaft voltage is analyzed according to change in parasitic capacitances using the equivalent circuit model and the torque characteristic is also analyzed to effectively mitigate the shaft voltage. As a result, the rotor-to-winding is determined as an appropriate parameter to mitigate the shaft voltage among the parasitic capacitances, because it affects the shaft voltage and does not affect the output torque. Finally, the shaft voltage mitigation method according to variation of rotor-to-winding capacitance is verified by experiment.
37 citations