POT model w/ PARAMS

* .include <<potentiometer model path>>

* This is the potentiometer
*      _____
*  1--|_____|--2
*        |
*        3
*
.SUBCKT POT 1 2 3 PARAMS: Rt=1K SET=0.5
RA 1 3 {Rt*(1-SET)+.001}
RB 3 2 {Rt*SET+.001}
.ENDS

* ngspice w/ LTSpice "Pote.lib" -> must define LIMIT function
.func LIMIT(x,y,z) { min(max(x,y),z) }

* set POT parameters
.PARAM Rt=100k
.PARAM SET=0.5
* voltage source // POT
V1 1 0 DC 1V
X1 0 1 2 POT Rt={Rt} SET={SET}
* operational point -> potentiometer as voltage divider
.OP
.END