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 Feb 2003TL;DR: In this article, the potential for mutual coupling in an integrated circuit package of any type or configuration using a network analyzer in conjunction with a coaxial test probe is measured using low-cost test fixturing and methods of testing.
Abstract: Apparatus and methods are provided for measuring the potential for mutual coupling in an integrated circuit package of any type or configuration using a network analyzer in conjunction with a coaxial test probe. Simple, low-cost test fixturing and methods of testing may be used to measure the parasitic capacitance and inductance of one or more I/O leads of an integrated circuit package, the measured parasitic capacitances and inductances providing an indication of the susceptibility of the integrated circuit package to mutual coupling between electrical leads of the package or between an electrical lead and other components of the integrated circuit package.
28 citations
Patent•
13 Dec 2002
TL;DR: In this paper, the problem of early deterioration of a conventional discharge lamp lighting device was solved by adding a capacitive component between the second wiring passage and the earth, and the capacitance between the earth and the first wiring passage is equalized to that between the ground and the second wires passage.
Abstract: PROBLEM TO BE SOLVED: To solve a problem in a conventional discharge lamp lighting device wherein a difference is made in voltages applied to the electrodes 21, 22 of the discharge lamp 20 due to different stray capacitance of cables 31, 32 connected to the discharge lamp 20, causing early deterioration of the discharge lamp 20. SOLUTION: This lighting device is provided with secondary windings 2a, 2b connected at one end in common having the same specifications, a discharge lamp 20 having electrodes at both ends, a cable 31, and a cable 32 having a shorter straight line between its both ends than that of the cable 31. The other end of the secondary winding 2a is connected to one electrode 21 of the discharge lamp 20 through a first wiring passage including the cable 31, and the other end of the secondary winding 2b to the other electrode 22 through a second wiring passage including the cable 32. A capacitive component is added between the second wiring passage and the earth, and the capacitance between the earth and the first wiring passage is equalized to that between the earth and the second wiring passage.
28 citations
Patent•
18 Apr 2014TL;DR: In this paper, a high-frequency device including a variable capacitance element and a high frequency device that includes a control voltage application circuit eliminating problems such as distortion due to active elements and growing IC size along with complication of circuit architecture, and ensuring reliability on impact due to falling or the like, are provided.
Abstract: A high-frequency device includes an antenna coil, a variable capacitance element, and an RFIC. The variable capacitance element is configured by capacitor units in each of which a ferroelectric film is sandwiched between capacitor electrodes, and a capacitance value changes according to a control voltage applied between the capacitor electrodes. A control voltage application circuit configured by a plurality of resistance elements of different resistance values, and a resistance element of the variable capacitance element unit configured to apply a control voltage to the variable capacitance element are arranged in a layered manner above the capacitor unit. Thus, a variable capacitance element and a high-frequency device that includes a control voltage application circuit eliminating problems such as distortion due to active elements and growing IC size along with complication of circuit architecture, and ensuring reliability on impact due to falling or the like, are provided.
27 citations
Patent•
24 Aug 2004
TL;DR: In this article, the authors have modeled the desired distributed capacitance by altering the radius associated with the equivalent line charge of the power via, the distance associated with line charges between power and ground vias, and the via barrel length.
Abstract: Power supplied to an information handling system electronic component through a circuit board has component package inductance parasitic effects compensated by configuring connections to the electronic component to have increased parasitic capacitance For instance, power and ground vias that connect a processor to power and ground planes of the circuit board are aligned to create a desired parasitic capacitance that reduces the impact of parasitic inductance relating to signal compensation, power delivery and high speed decoupling The desired distributed capacitance is modeled by altering the radius associated with the equivalent line charge of the power via, the distance associated with the line charges between power and ground vias, and the via barrel length
27 citations
05 May 1997
TL;DR: A charge pump cell is used to make a voltage doubler using improved serial switches and the importance of capacitors is shown with plots of efficiency versus load and stray capacitance.
Abstract: A charge pump cell is used to make a voltage doubler using improved serial switches. The PMOS transistor used for the serial switch is analyzed and a model suitable for simulation is described. The importance of capacitors is shown with plots of efficiency versus load and stray capacitance. Several problems arising at low voltage or high frequency are developed and some optimizations are presented. The substrate current is totally suppressed by the technique of bulk commutation. An efficiency of 94% has been reached using external capacitors.
27 citations