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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
Parents

  •  Andrew,

    Through the options tab, I am able to do only one attachment but not multiple :-(

    When I tried to add second one, the first one gets removed automatically.

    I tried that option.

    Below is the path:

    /Application/cadence/Cadence_db/cadence_ms_labs_613/cds.lib

    I opened the cds.lib file and found that the Solutions library is defined in it.

    I have attached the snapshot of the same. When I try to upload attachments through cadence online forum, I am unable to attach them. So, I am sending mail to you.

     

    Regarding the manual, its not a cadence manual. Its the manual done by University of Mexico.

     

    I have attached the snapshots of the "Solutions" library which is the default library from Cadence.
    I am using Cadence version 6.1.5.

    I found op_amp schematic in Solutions library with differential amplifier and CS amplifier as blocks.

    Then I got to see the schematic of the differential amplifier and CS amplifier in the "Solutions" folder.

     

    My intention is to use OpAmp as linear multiplier for ASK modulation. But I had never used Opamp in my design. Moreover, I had never used any symbols from "Solutions" library. In order to test whether the symbol suits to my application, I had simulated a simple voltage amplifier circuit which amplifies the input signal by 10 times.


    Hope you understand my point now.

    Please let me know where I was wrong and how to correct the same.

     

    Thanks,

    Shahnaz

     


     

Reply

  •  Andrew,

    Through the options tab, I am able to do only one attachment but not multiple :-(

    When I tried to add second one, the first one gets removed automatically.

    I tried that option.

    Below is the path:

    /Application/cadence/Cadence_db/cadence_ms_labs_613/cds.lib

    I opened the cds.lib file and found that the Solutions library is defined in it.

    I have attached the snapshot of the same. When I try to upload attachments through cadence online forum, I am unable to attach them. So, I am sending mail to you.

     

    Regarding the manual, its not a cadence manual. Its the manual done by University of Mexico.

     

    I have attached the snapshots of the "Solutions" library which is the default library from Cadence.
    I am using Cadence version 6.1.5.

    I found op_amp schematic in Solutions library with differential amplifier and CS amplifier as blocks.

    Then I got to see the schematic of the differential amplifier and CS amplifier in the "Solutions" folder.

     

    My intention is to use OpAmp as linear multiplier for ASK modulation. But I had never used Opamp in my design. Moreover, I had never used any symbols from "Solutions" library. In order to test whether the symbol suits to my application, I had simulated a simple voltage amplifier circuit which amplifies the input signal by 10 times.


    Hope you understand my point now.

    Please let me know where I was wrong and how to correct the same.

     

    Thanks,

    Shahnaz

     


     

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