step_gen :
An analog step generator

The step_gen primitive generates an xreal-typed step signal. In other words, it generates a signal that changes from init_value to init_value+change after delay from time 0.

   init_value+change                 +-----------------------------------
                                     |
   init_value         ---------------+
                      ^              ^
                      |              |
   time               0            delay

The primitive can also generate a pulse with finite duration when its parameter width is defined with a positive value.

   init_value+change                 +--------+
                                     |        |
   init_value         ---------------+        +--------------------------
                      ^              ^        ^
                      |              |        |
   time               0            delay delay+width

And the primitive can repeat this finite-duration pulse when the parameter period is defined with a positive value greater than the value of the parameter width.

   init_value+change                 +--------+            +--------+
                                     |        |            |        |
   init_value         ---------------+        +------------+        +---- ...
                      ^              ^        ^            ^
                      |              |        |            |
   time               0            delay delay+width  delay+period

Input/Output Terminals

Name	I/O	Type	Description
out	output	xreal	signal output

Parameters

Name	Type	Default	Unit	Description
init_value	real	0.0	None	initial value
change	real	0.0	None	step change
delay	real	0.0	seconds	delay
width	real	-1.0	seconds	step pulse width
period	real	-1.0	seconds	repetition period