Rise time

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<div class="definition"><div class="short_definition">Usually, the time required for a [[pulse]] to increase from 10% of its final value to 90% of  its final value.</div><br/> <div class="paragraph">Rise time is less frequently measured between the 5% and 95% points or the 1% and 99%  points. Rise time is used to specify the [[transient]] response of an instrument, and is similar to its  [[time constant]], [[relaxation time]], or [[response time]], although these latter terms use (1 - ''e''<sup>-1</sup>), or  about 63%, as the fractional change in state over which time is measured, beginning at an initial  value. For example, if a step increase of 10&#x000b0; is applied to a [[thermometer]] registering 0&#x000b0; with a rise  time of 50 s, the thermometer would increase from 1&#x000b0; to 9&#x000b0; in 50 s. Note that nothing is specified  concerning the time required for the instrument to respond to the first or last 10%. <br/>''See also'' [[time  lag]].</div><br/> </div>
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<div class="definition"><div class="short_definition">Usually, the time required for a [[pulse]] to increase from 10% of its final value to 90% of  its final value.</div><br/> <div class="paragraph">Rise time is less frequently measured between the 5% and 95% points or the 1% and 99%  points. Rise time is used to specify the [[transient]] response of an instrument, and is similar to its  [[time constant]], [[relaxation time]], or [[response time]], although these latter terms use (1 - ''e''<sup>-1</sup>), or  about 63%, as the fractional change in state over which time is measured, beginning at an initial  value. For example, if a step increase of 10&#x000b0; is applied to a [[thermometer]] registering 0&#x000b0; with a rise  time of 50 s, the thermometer would increase from 1&#x000b0; to 9&#x000b0; in 50 s. Note that nothing is specified  concerning the time required for the instrument to respond to the first or last 10%. <br/>''See also'' [[time lag|time  lag]].</div><br/> </div>
 
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Latest revision as of 19:48, 25 April 2012


[edit] rise time

Usually, the time required for a pulse to increase from 10% of its final value to 90% of its final value.

Rise time is less frequently measured between the 5% and 95% points or the 1% and 99% points. Rise time is used to specify the transient response of an instrument, and is similar to its time constant, relaxation time, or response time, although these latter terms use (1 - e-1), or about 63%, as the fractional change in state over which time is measured, beginning at an initial value. For example, if a step increase of 10° is applied to a thermometer registering 0° with a rise time of 50 s, the thermometer would increase from 1° to 9° in 50 s. Note that nothing is specified concerning the time required for the instrument to respond to the first or last 10%.
See also time lag.

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