英和和英

出典:『Wikipedia』 (2011/03/31 17:49 UTC 版)

英語による解説

引用

An ESR meter is a two-terminal electronic measuring instrument designed and used primarily to measure the equivalent series resistance (ESR) of real capacitors—the ESR of an ideal capacitor is zero—usually without the need to disconnect the capacitor from the circuit it is connected to. Most ESR meters work by applying voltage pulses to the capacitor under test which are too short to appreciably charge it; any voltage appearing across the capacitor is due to ohmic drop across the ESR. An alternating voltage at a frequency at which the capacitor's reactance is negligible, in a voltage divider configuration, can also be used.