Table of Contents

"slope" measure

Purpose

Find the slope or slew rate of a waveform.

Syntax

slope(probe="p(d)" initial=value final=value begin=time end=time expression)

Parameters

arg name default description
probe required The name of a probe to measure.
initial 0 The initial value.
final 0 The final value.
begin -infinity The window begins at this time or frequency.
end +infinity The window ends at this time or frequency.
first true Find the first crossing in the window. (Cancels last.)
last false Find the last crossing in the window. (Cancels first.)
expression false The result is an unreduced expression.

Comments

Ordinarily, the result is a number. If the probe is a voltage probe the units would be volts per second.

If the “expression” keyword is given the result is an unreduced expression.

Examples

measure sr = slope(probe="v(out)" initial=-2 final=2 last)

Find the slope (slew rate) for the last transition from -2 to 2, as a number.

sr= 30.15738K
measure sr = slope(probe="v(out)" initial=-2 final=2 last expression)

Find the slope (slew rate) for the last transition from -2 to 2, as an unreduced expression.

sr={( 2.--2.)/( 0.001066319- 933.6812u)}