Messing up With Potentiometer[ORCAD]

[zerox2]

Hello,
I trying to do some experiment with my PWM signal and I'm newbie on this, the reason is i trying to finds the potentiometer symbol and cannot found any symbol. I'm only found the R_VAR and this makes me frustrated...anyone can help me regarding on this matter..Is this potentiometer needs some *.olb file to add and I don't know where this part hidden...

 

[eng1]

You can always use two resistors in series (R1, R2), so that their sum is the total resistance of the potentiometer. For example, if you need a 10k ohms potentiometer, you might assign PARAMETERs to R1 and R2: R1=A and R2=10000-A.

 

[Roff]

You can always use two resistors in series (R1, R2), so that their sum is the total resistance of the potentiometer. For example, if you need a 10k ohms potentiometer, you might assign PARAMETERs to R1 and R2: R1=A and R2=10000-A.

And A>0, since Spice doesn't like zero ohm resistors.
I like to let R1=A*Rpot+0.001 and R2=(1-A)*Rpot (the 0.001 allows A to go from zero to one). This simulates a linear pot (linear attenuation vs rotation).

 

[zerox2]

thanks for the help...It really helps me a lot...