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Reading from a text file in Spectre

Analogstudent

Hi all,

How can I convert the below Hspice code to something acceptable for Spectre?

************************************************************************************

 Simulator lang=spice

.Tran 100u 1m


.DATA vals LAM
+ FILE='data1'
+ idep1val=1
+ itd1val=2
.ENDDATA   ****** This is how it works in Hspice

Idep1 vdd idep1  idep1val   ***** Bias currents in my spectre netlist
Itd1  vdd itd1   itd1val  

 *********************************************************************

This is the stimulus file that I have included for my scptre simulation.  

It works fine if I just mention the reuired values like this:

Idep1 vdd idep1  100u
Itd1  vdd itd1   100p 

But I need to read these values from an extrenal file and that's where it doesn't like it.

 Is there any better way of doing this?

Your help is highly appreciated.

Regards

Mostafa

 

Parents
  • Andrew Beckett

    Mostafa,

    The only point of using a paramset is if you want to sweep - so for example you can use a sweep analysis to vary the parameters over the paramset. But you need a default value defined in a parameters statement:

     

    // parameter set example
    parameters p1=1 p2=2 p3=3 p4=4 val1
    r1 1 2 resistor r=p1
    r2 2 3 resistor r=p2
    r3 3 4 resistor r=p3
    r4 4 0 resistor r=p4
    v1 1 0 vsource dc=1

    mydata paramset {
    p2 p3
    1 2
    1 0.5
    2 3
    }

    sweep1 sweep param=p1 start=1 stop=2 step=1 {
      sweep2 sweep paramset=mydata {
          sweep4 sweep param=p4 start=1 stop=5 step=1 {
            dc dc start=0.5 stop=5 step=0.5 param=dc dev=v1
          }
        }
    }

     

     Hopefully that's clearer

Reply
  • Andrew Beckett

    Mostafa,

    The only point of using a paramset is if you want to sweep - so for example you can use a sweep analysis to vary the parameters over the paramset. But you need a default value defined in a parameters statement:

     

    // parameter set example
    parameters p1=1 p2=2 p3=3 p4=4 val1
    r1 1 2 resistor r=p1
    r2 2 3 resistor r=p2
    r3 3 4 resistor r=p3
    r4 4 0 resistor r=p4
    v1 1 0 vsource dc=1

    mydata paramset {
    p2 p3
    1 2
    1 0.5
    2 3
    }

    sweep1 sweep param=p1 start=1 stop=2 step=1 {
      sweep2 sweep paramset=mydata {
          sweep4 sweep param=p4 start=1 stop=5 step=1 {
            dc dc start=0.5 stop=5 step=0.5 param=dc dev=v1
          }
        }
    }

     

     Hopefully that's clearer

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