/* Because the cell area is in units of square microns, all the       *
 * distance units will be assumed to be in microns or square microns. */

/* fudge = correction factor, routing, placement, etc. */
   fudge = 1.0;

/* cap = fudge * cap per micron                    *
 * I assume cap is in capacitance units per micron *
 * (remember that our capacitance unit is 1.0pf)   */
   cap = fudge * 0.000030; /* .03ff/micron for avg metal     */
   res = fudge * 0.00008   /* 80 m-ohm/square, in kohm units */

/* length_top = the length of one side of a square die (in our case, *
 * a 4 TCU die of 2500u on a side of core area) length_10k = the     *
 * length of one side of a block containing 10k gates (I'll assume   *
 * this is a core of a single TCU which is 900u on a side)           */ 
   length_10k = 900;
   length_top = 2500.0;

/* sqrt(5000/10000) = .71        *
 * sqrt(2000/10000) = .45 etc    */
   length_5k  = length_10k * 0.71; 
   length_2k  = length_10k * 0.45;
   length_1k  = length_10k * 0.32;
   length_500 = length_10k * 0.22;