出典:Wiktionary
time constant (複数形 time constants)
出典:Wikipedia
出典:『Wikipedia』 (2011/07/18 04:54 UTC 版)
In physics and engineering, the time constant, usually denoted by the Greek letter τ (tau), is the risetime characterizing the response to a time-varying input of a first-order, linear time-invariant (LTI) system. The time constant is the main characteristic unit of a first-order LTI (linear time-invariant) system.