Fall time

This article is about the electronics concept. For the film, see Fall Time.

In electronics, fall time (pulse decay time) $\scriptstyle t_f\,$ is the time required for the amplitude of a pulse to decrease (fall) from a specified value (usually 90 percent of the peak value exclusive of overshoot or undershoot) to another specified value (usually 10 percent of the maximum value exclusive of overshoot or undershoot). Limits on undershoot and oscillation (aka, ringing or hunting) may need to be specified when specifying fall time limits.

See also

• Rise time
• Transition time

References

•  This article incorporates public domain material from the General Services Administration document "Federal Standard 1037C" (in support of MIL-STD-188).