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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
  • Analogstudent

     Thank you Andrew,

    Your example makes everything clear for me. I guess this approach is not useful for me.

    What I'm going to do is,

    (1) reading the bias values from a file,

    (2) simulating the circuit using those bias values,

    (3) computing an error value using the outputs of the circuit,

    (4) checking a termination criteria,

    (5) writing a new bias set to the file again till my termination criteria is satisfied.

    (6) back to (1) 

     

     I already did that in Hspice, but I can't do that in Spectre. Maybe I'll do the whole thing again in Hspice.

     

    Anyway, thank you very much for your time.

    Mostafa

Reply
  • Analogstudent

     Thank you Andrew,

    Your example makes everything clear for me. I guess this approach is not useful for me.

    What I'm going to do is,

    (1) reading the bias values from a file,

    (2) simulating the circuit using those bias values,

    (3) computing an error value using the outputs of the circuit,

    (4) checking a termination criteria,

    (5) writing a new bias set to the file again till my termination criteria is satisfied.

    (6) back to (1) 

     

     I already did that in Hspice, but I can't do that in Spectre. Maybe I'll do the whole thing again in Hspice.

     

    Anyway, thank you very much for your time.

    Mostafa

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