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Verilog A code with lookup table

Gold

Hai,

I have a doubt in TFET based Mixer circuit design. Actually I have downloaded InAs TFET model generated by PennState University. This model is having verilog A code and lookup table for current and capacitance values. I am trying to use this model in cadence virtuoso. I did DC and AC analysis. Is it possible to find pss, pac analysis for mixer circuit using InAs TFET model?

Thank you.

Parents

  • Hi,

    I have table with two inputs X and Y and an output Z=F(X,Y). I am facing the following error upon running the simulation.

    FATAL (VLOGA-5081): "veriloga/veriloga.va" 21: I2: $table_model failed: Insufficient sample points. The table must provide at least two points for each isoline. Correct the problem and try again.
    FATAL (VLOGA-5083): "veriloga/veriloga.va" 21: I2: Found only sample points 'y=10.840000' when 'x=11.850000' for table model data of form output = F(x,y). Provide at least one more point with different 'y' value when 'x=11.850000' and try again.

    This is how my table looks like:

    11.85 10.84 -1.73E-06
    11.85 10.84 -1.73E-06
    13.29 8.81 -1.96E-05
    13.37 8.596 -1.99E-05

    I understand the problem that it expects atleast two points in each dimension so it can interpolate. I want to know is there an option to turn off interpolation if the nearest neighbour is not found. Or in other words, is there a way to specify $table_model to just return exact value like a LUT: 

    Please help me here. Thank you.

Reply

  • Hi,

    I have table with two inputs X and Y and an output Z=F(X,Y). I am facing the following error upon running the simulation.

    FATAL (VLOGA-5081): "veriloga/veriloga.va" 21: I2: $table_model failed: Insufficient sample points. The table must provide at least two points for each isoline. Correct the problem and try again.
    FATAL (VLOGA-5083): "veriloga/veriloga.va" 21: I2: Found only sample points 'y=10.840000' when 'x=11.850000' for table model data of form output = F(x,y). Provide at least one more point with different 'y' value when 'x=11.850000' and try again.

    This is how my table looks like:

    11.85 10.84 -1.73E-06
    11.85 10.84 -1.73E-06
    13.29 8.81 -1.96E-05
    13.37 8.596 -1.99E-05

    I understand the problem that it expects atleast two points in each dimension so it can interpolate. I want to know is there an option to turn off interpolation if the nearest neighbour is not found. Or in other words, is there a way to specify $table_model to just return exact value like a LUT: 

    Please help me here. Thank you.

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