4.9 PULSE: Pulsed time dependent value

4.9.1 Syntax

PULSE args
PULSE iv pv delay rise fall width period

4.9.2 Purpose

The component value is a pulsed function of time.

4.9.3 Comments

For voltage and current sources, this is the same as the Spice PULSE function, with some extensions.

The shape of a single pulse is described by the following algorithm:

if (time > _delay+_rise+_width+_fall){
 // past pulse
 ev = _iv;
}else if (time > _delay+_rise+_width){
 // falling
 interp=(time-(_delay+_rise+_width))/_fall;
 ev = _pv + interp * (_iv - _pv);
}else if (time > _delay+_rise){
 // pulsed value
 ev = _pv;
}else if (time > _delay){
 // rising
 interp = (time - _delay) / _rise;
 ev = _iv + interp * (_pv - _iv);
}else{
 // initial value
 ev = _iv;
}

For other components, it gives a time dependent value.

As an extension beyond Spice, you may specify the parameters as name=value pairs in any order.

4.9.4 Parameters

IV = x

Initial value. (required)

PV = x

Pulsed value. (required)

DELAY = x

Rise time delay, seconds. (Default = 0.)

RISE = x

Rise time, seconds. (Default = 0.)

FALL = x

Fall time, seconds. (Default = 0.)

WIDTH = x

Pulse width, seconds. (Default = 0.)

PERIOD = x

Repeat period, seconds. (Default = infinity.)