“capacitor”的概念、定义、翻译、参考文献-科学参考

capacitor

Physics

An arrangement of conductors separated by an insulator (dielectric) used to store charge or introduce reactance into an alternating-current circuit. The earliest form was the Leyden jar. Capacitors used as circuit elements have two conducting plates separated by the dielectric. The dielectric may be air, paper impregnated with oil or wax, plastic film, or ceramic. The simplest form has two parallel rectangular conducting plates (area A) separated by a dielectric (thickness d, permittivity ε‎). The capacitance of such a capacitor is Aε‎/d. Electrolytic capacitors are devices in which a thin layer of an oxide is deposited on one of the electrodes to function as the dielectric.

Electronics and Electrical Engineering

A component that has an appreciable capacitance. It consists of an arrangement of at least two conductors or semiconductors separated by a dielectric (an insulator). The conductors or semiconductors are known as electrodes or plates. The value of the capacitance of a given device depends on the size and shape of the electrodes, the separation between them, and the relative permittivity of the dielectric. Most types of capacitor have a value, which may be variable, determined by the geometry of the device. Some capacitors however have a value that is also a function of the voltage across the device or of the operating frequency. The dielectric material may be solid, liquid, or gaseous. In circuit analysis, capacitative effects are often treated via a lumped approach, where the properties of an ideal capacitor are described by the time-domain relationship
$i (t) = C \frac{d v (t)}{d t}$
In the Laplace domain this becomes
$V (s) = \frac{1}{s C} I (s) + \frac{v (0)}{s}$
where $1 / s C$ is the Laplace impedance of the capacitor, and any charge stored on the capacitor at start-up is included naturally in terms of an initial voltage $v (0)$ . See also ceramic capacitor; chip capacitor; electrolytic capacitor; metallized film capacitors; metallized paper capacitors; mica capacitor; MOS capacitor; plastic-film capacitor; varactor.
http://www.iequalscdvdt.com/index.html An introduction to capacitors
http://electronics.howstuffworks.com/capacitor.htm/printable Capacitors explained, on the howstuffworks website

单词	capacitor
释义	capacitor Physics An arrangement of conductors separated by an insulator (dielectric) used to store charge or introduce reactance into an alternating-current circuit. The earliest form was the Leyden jar. Capacitors used as circuit elements have two conducting plates separated by the dielectric. The dielectric may be air, paper impregnated with oil or wax, plastic film, or ceramic. The simplest form has two parallel rectangular conducting plates (area A) separated by a dielectric (thickness d, permittivity ε‎). The capacitance of such a capacitor is Aε‎/d. Electrolytic capacitors are devices in which a thin layer of an oxide is deposited on one of the electrodes to function as the dielectric. Electronics and Electrical Engineering A component that has an appreciable capacitance. It consists of an arrangement of at least two conductors or semiconductors separated by a dielectric (an insulator). The conductors or semiconductors are known as electrodes or plates. The value of the capacitance of a given device depends on the size and shape of the electrodes, the separation between them, and the relative permittivity of the dielectric. Most types of capacitor have a value, which may be variable, determined by the geometry of the device. Some capacitors however have a value that is also a function of the voltage across the device or of the operating frequency. The dielectric material may be solid, liquid, or gaseous. In circuit analysis, capacitative effects are often treated via a lumped approach, where the properties of an ideal capacitor are described by the time-domain relationship $i (t) = C \frac{d v (t)}{d t}$ In the Laplace domain this becomes $V (s) = \frac{1}{s C} I (s) + \frac{v (0)}{s}$ where $1 / s C$ is the Laplace impedance of the capacitor, and any charge stored on the capacitor at start-up is included naturally in terms of an initial voltage $v (0)$ . See also ceramic capacitor; chip capacitor; electrolytic capacitor; metallized film capacitors; metallized paper capacitors; mica capacitor; MOS capacitor; plastic-film capacitor; varactor. http://www.iequalscdvdt.com/index.html An introduction to capacitors http://electronics.howstuffworks.com/capacitor.htm/printable Capacitors explained, on the howstuffworks website
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