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converting analog bit to signed decimal

abdurrahman0234

Hı, I have 3 bit analog bits. I want to convert it to sıgned decimal output except 3'b100. because I want to get 3'b100 as a 0100(convert '-4' to '4'). Can u help me verilogA code for converting, please

  • Andrew Beckett

    I would start by taking dac_8bit_ideal from ahdlLib, which you can add in your cds.lib by adding:

    DEFINE ahdlLib $(inst_root_with:tools/dfII/bin/virtuoso)/tools/dfII/samples/artist/ahdlLib

    You can simplify this down to 3 bits, and then have out_scaled being the unsigned value (I probably would make out_scaled being an integer rather than real). It is then a bit of simple maths to convert the values above 4 to be negative - for example:

    if(out_scaled>4) begin
      out_scaled=8-out_scaled
    end

    Andrew

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