* Variation block example

* The example demonstrates using of variation block. The variation block 
* provides an ability to change certain model/device parameter during Monte Carlo simulation. 
* The block define global variation for all resistor of 'rpoly' model. All the devices of this model 
* get the same variation of 'rsh' parameter.
* The block also contains definition of local variation. The local variation is applied 'tcl' parameter 
* of every resitor of 'rpoly' model. All these devices get different value of 'tcl' value


*********************************************
* Netlist
ra1 2 1 1k
rb1 2 1 1k
ra2 1 0 rpoly l=10u w=1u
rb2 1 0 rpoly l=10u w=1u
v1 2 0 DC 5
*********************************************


*********************************************
* Model definition
.model rpoly r rsh=100 tc1=0.01
*********************************************

.tran 0.1 2 monte=4
.print @ra2[rsh] @ra2[tc1] @rb2[rsh] @rb2[tc1]
.options nomod nodeck

*********************************************
* Variation block definition
.variation

* Global variation block
	.global_variation
		parameter random1=N()
		R rpoly rsh=perturb('random1/3')
	.end_global_variation

* Local variation block
	.local_variation
		R rpoly tc1 ='25 + 1/3'
	.end_local_variation

.end_variation
*********************************************

.end
											

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