# time constant

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time constant
a) A characteristic of an exponential function, represented by τ in the function:

:.

b) The time in which a physical systems response to a step-wise change in an external variable reaches approximately 63% of its final (asymptotic) value.

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• time constant — noun 1. (electronics) the time required for the current or voltage in a circuit to rise or fall exponentially through approximately 63 per cent of its amplitude • Topics: ↑electronics • Hypernyms: ↑time interval, ↑interval • Hyponyms: ↑ …   Useful english dictionary

• time constant — Elect. the time required for a changing quantity in a circuit, as voltage or current, to rise or fall approximately 0.632 of the difference between its old and new value after an impulse has been applied that induces such a change: equal in… …   Universalium

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• time constant — Смотри постоянная времени …   Энциклопедический словарь по металлургии

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• time constant of an exponentially varying quantity — eksponentinio vyksmo trukmės konstanta statusas T sritis Standartizacija ir metrologija apibrėžtis Laiko tarpas, per kurį dydis pasiektų savo ribinę vertę, jei išlaikytų pradinę kitimo spartą. atitikmenys: angl. time constant of an exponentially… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

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