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VCA820 PSPICE model

Wasiu Popoola
Prodigy 90 points
Other Parts Discussed in Thread: VCA820

Hi,

I was trying to use the variable gain amplifier VGA820 as an AGC, and thought i should simulate in PSPICE first. I downloaded the macromodel from TI  website and the simulation won't run. It came up with the following errors:

ERROR -- Subcircuit VCA82X_INPUT_BUFFER_U6_F1 used by X_U1.X_U6_F1 is undefined
ERROR -- Subcircuit VCA82X_BIAS_U7_F8 used by X_U1.X_U7_F8 is undefined
ERROR -- Subcircuit VCA82X_BIAS_U7_F1 used by X_U1.X_U7_F1 is undefined
ERROR -- Subcircuit VCA82X_BIAS_U7_F6 used by X_U1.X_U7_F6 is undefined
ERROR -- Subcircuit VCA82X_BIAS_U7_F3 used by X_U1.X_U7_F3 is undefined
ERROR -- Subcircuit VCA82X_BIAS_U7_F4 used by X_U1.X_U7_F4 is undefined
ERROR -- Subcircuit VCA82X_BIAS_U7_F2 used by X_U1.X_U7_F2 is undefined
ERROR -- Subcircuit VCA82X_BIAS_U7_F7 used by X_U1.X_U7_F7 is undefined
ERROR -- Subcircuit VCA82X_BIAS_U7_F5 used by X_U1.X_U7_F5 is undefined
ERROR -- Subcircuit VCA820_2_OUTPUT_STAGE_U8_F1 used by X_U1.X_U8_F1 is undefined

Can anyone help on this please?

Popoola

  • 0
    TI__Genius 17905 points

    Hello Popoola,

    In your Pspice model editor, make sure that the following lines are in the imported macro code These lines can be truncated during the import.


    .subckt VCA82X_INPUT_BUFFER_U6_F1 1 2 3 4 
    F_U6_F1         3 4 VF_U6_F1 30
    VF_U6_F1         1 2 0V
    .ends VCA82X_INPUT_BUFFER_U6_F1

    .subckt VCA82X_BIAS_U7_F8 1 2 3 4 
    F_U7_F8         3 4 VF_U7_F8 1
    VF_U7_F8         1 2 0V
    .ends VCA82X_BIAS_U7_F8

    .subckt VCA82X_BIAS_U7_F1 1 2 3 4 
    F_U7_F1         3 4 VF_U7_F1 1
    VF_U7_F1         1 2 0V
    .ends VCA82X_BIAS_U7_F1

    .subckt VCA82X_BIAS_U7_F6 1 2 3 4 
    F_U7_F6         3 4 VF_U7_F6 1
    VF_U7_F6         1 2 0V
    .ends VCA82X_BIAS_U7_F6

    .subckt VCA82X_BIAS_U7_F3 1 2 3 4 
    F_U7_F3         3 4 VF_U7_F3 1
    VF_U7_F3         1 2 0V
    .ends VCA82X_BIAS_U7_F3

    .subckt VCA82X_BIAS_U7_F4 1 2 3 4 
    F_U7_F4         3 4 VF_U7_F4 1
    VF_U7_F4         1 2 0V
    .ends VCA82X_BIAS_U7_F4

    .subckt VCA82X_BIAS_U7_F2 1 2 3 4 
    F_U7_F2         3 4 VF_U7_F2 1
    VF_U7_F2         1 2 0V
    .ends VCA82X_BIAS_U7_F2

    .subckt VCA82X_BIAS_U7_F7 1 2 3 4 
    F_U7_F7         3 4 VF_U7_F7 1
    VF_U7_F7         1 2 0V
    .ends VCA82X_BIAS_U7_F7
    .subckt VCA82X_BIAS_U7_F5 1 2 3 4 
    F_U7_F5         3 4 VF_U7_F5 1
    VF_U7_F5         1 2 0V
    .ends VCA82X_BIAS_U7_F5

    .subckt VCA820_2_OUTPUT_STAGE_U8_F1 1 2 3 4 
    F_U8_F1         3 4 VF_U8_F1 1900
    VF_U8_F1         1 2 0V
    .ends VCA820_2_OUTPUT_STAGE_U8_F1

    These lines should appear after the line '.ENDS VCA820_Model'

  • 0 in reply to Kris F
    TI__Genius 17905 points

    Popoola - were you able to get the model to work?

  • 0 in reply to Kris F
    Prodigy 90 points

    Hi Kristoffer,

    Yeah, i just did. Thanks very much for your help.

    Cheers.

     

    Popoola