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Home : Support : Online Help : MapleSim : MapleSim Component Library : Electrical : Spice3 : Sources : Current : I_exp

I_exp

Exponential current source

Modelica Standard Library

	Description
	The I_exp component models a rising and falling exponential source.

	Equations
	$i = i_{p} = - i_{n}$ $i = I_{1} + {\begin{array}{c} 0 & t < {TD}_{1} \\ {\begin{array}{c} (I_{2} - I_{1}) (1 - \exp (- \frac{t - {TD}_{1}}{τ_{1}})) & t < {TD}_{2} \\ (I_{2} - I_{1}) (1 - \exp (- \frac{t - {TD}_{1}}{τ_{1}})) + (I_{1} - I_{2}) (1 - \exp (- \frac{t - {TD}_{2}}{τ_{2}})) & otherwise \end{array} & otherwise \end{array}$ $v = v_{p} - v_{n}$

Variables

Name	Units	Description	Modelica ID
$v$	$V$	Voltage drop between the two pins $(v_{p} - v_{n})$	v
$i$	$A$	Current flowing from pin p to pin n	i

Connections

Name	Description	Modelica ID
$p$	Positive pin	p
$n$	Negative pin	n

Parameters

Name	Default	Units	Description	Modelica ID
$I_{1}$	$0$	$A$	Initial value	I1
$I_{2}$	$0$	$A$	Pulsed value	I2
$T_{D1}$	$0$	$s$	Rise delay time	TD1
$TAU1$	$1$	$s$	Rise time constant	TAU1
$T_{D2}$	$2$	$s$	Fall delay time	TD2
$TAU2$	$1$	$s$	Fall time constant	TAU2

	Modelica Standard Library
	The component described in this topic is from the Modelica Standard Library. To view the original documentation, which includes author and copyright information, click here.

See Also

Analog Components

Spice3 Current Sources

Spice3 Overview

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