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OpAmp Simulation in Cadence Spectre

Shahnaf
Hi, I have used OpAmp symbol from Solutions library (default library of cadence). As an initial step, I have simulated a basic circuit in Op Amp. But I am not getting the desired output. Moreover, I have checked the cadence simulation manual for Op Amp. I found something difference in the symbol (from Solutions library) to that of the Cadence manual. Can you please let me know where I am wrong and what needs to be corrected? Thanks, Shahnaz
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  • Shahnaz,

    Please read the Forum Guidelines.  There are so many things that are undefined, that it's hard for anyone to answer:

    1. Which "Solutions" library? The only library I can find is in <ICinstDir>/tools/dfII/samples/artist/solutions (note it's in lower case). This contains a cell called ampTest but it doesn't look the same as the one you posted a picture of (hard to tell, because it's rather a small bitmap).
    2. Which version are you using?
    3. Which "Cadence simulation manual" are you talking about. I can't find any reference to this. Is it a Cadence manual, or one from some University course?
    4. You're not getting the desired output - what is your desired output, and what did you actually get?
    5. I'm not sure what you mean by "As an initial step, I have simulated a basic circuit in Op Amp". What does "simulating a basic circuit in Op Amp" mean?

    If you don't ask clear and precise questions, it's unlikely you'll get a clear and precise answer, unfortunately. I'd love to be able to help you, but hard to with insufficient information!

    Best Regards,

    Andrew.

Reply

  • Shahnaz,

    Please read the Forum Guidelines.  There are so many things that are undefined, that it's hard for anyone to answer:

    1. Which "Solutions" library? The only library I can find is in <ICinstDir>/tools/dfII/samples/artist/solutions (note it's in lower case). This contains a cell called ampTest but it doesn't look the same as the one you posted a picture of (hard to tell, because it's rather a small bitmap).
    2. Which version are you using?
    3. Which "Cadence simulation manual" are you talking about. I can't find any reference to this. Is it a Cadence manual, or one from some University course?
    4. You're not getting the desired output - what is your desired output, and what did you actually get?
    5. I'm not sure what you mean by "As an initial step, I have simulated a basic circuit in Op Amp". What does "simulating a basic circuit in Op Amp" mean?

    If you don't ask clear and precise questions, it's unlikely you'll get a clear and precise answer, unfortunately. I'd love to be able to help you, but hard to with insufficient information!

    Best Regards,

    Andrew.

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