why ELC internal power result so large???

[willvlsi]

Hi, all

I am characterizing a std library using encounter library characterizer, after the result comes out, the timing is almost the same with my reference lib, however, the internal power is much larger than the reference.

Here is the ref lib example of inv:

   internal_power() {
      related_pin : "I";
      fall_power(energy_template_7x7) {
        index_1 ("0.1500, 0.1950, 0.2850, 0.4650, 0.8250, 1.5450, 3.0000");
        index_2 ("0.0275, 0.0358, 0.0524, 0.0856, 0.1520, 0.2848, 0.5500");
    values("0.0146, 0.0143, 0.0139, 0.0137, 0.0135, 0.0134, 0.0133", \
          "0.0177, 0.0172, 0.0165, 0.0152, 0.0146, 0.0140, 0.0137", \
          "0.0263, 0.0247, 0.0229, 0.0202, 0.0178, 0.0160, 0.0148", \
          "0.0485, 0.0454, 0.0403, 0.0340, 0.0280, 0.0225, 0.0186", \
          "0.1052, 0.0980, 0.0873, 0.0732, 0.0574, 0.0426, 0.0314", \
          "0.2376, 0.2253, 0.2054, 0.1763, 0.1414, 0.1049, 0.0729", \
          "0.5292, 0.5112, 0.4801, 0.4300, 0.3606, 0.2807, 0.2020");
      }
      rise_power(energy_template_7x7) {
        index_1 ("0.1500, 0.1950, 0.2850, 0.4650, 0.8250, 1.5450, 3.0000");
        index_2 ("0.0275, 0.0358, 0.0524, 0.0856, 0.1520, 0.2848, 0.5500");
    values("0.1132, 0.1125, 0.1118, 0.1109, 0.1107, 0.1104, 0.1110", \
          "0.1177, 0.1163, 0.1148, 0.1144, 0.1120, 0.1112, 0.1109", \
          "0.1302, 0.1277, 0.1250, 0.1210, 0.1177, 0.1140, 0.1121", \
          "0.1589, 0.1547, 0.1488, 0.1403, 0.1315, 0.1236, 0.1180", \
          "0.2244, 0.2176, 0.2069, 0.1912, 0.1719, 0.1527, 0.1368", \
          "0.3664, 0.3568, 0.3398, 0.3128, 0.2774, 0.2350, 0.1952", \
          "0.6688, 0.6550, 0.6313, 0.5917, 0.5317, 0.4535, 0.3648");
      }

Here is my result from ELC:

   internal_power() {
      related_pin : "I";
      rise_power(energy_template_7x7) {
        index_1 ("0.15, 0.195, 0.285, 0.465, 0.825, 1.545, 3");
        index_2 ("0.0275, 0.0358, 0.0524, 0.0856, 0.152, 0.2848, 0.55");
        values ( \
          "0.250143, 0.294332, 0.384242, 0.564545, 0.926109, 1.64877, 3.09253", \
          "0.25458, 0.298545, 0.387506, 0.566799, 0.926855, 1.6491, 3.09263", \
          "0.266756, 0.309973, 0.397712, 0.575173, 0.932731, 1.65136, 3.09405", \
          "0.296662, 0.33773, 0.42031, 0.592889, 0.945036, 1.66245, 3.10148", \
          "0.361799, 0.400121, 0.480181, 0.642851, 0.985232, 1.68859, 3.12031", \
          "0.499045, 0.533272, 0.606913, 0.762445, 1.08822, 1.77142, 3.18192", \
          "0.795337, 0.826922, 0.893386, 1.03452, 1.33868, 1.97731, 3.34011");
      }
      fall_power(energy_template_7x7) {
        index_1 ("0.15, 0.195, 0.285, 0.465, 0.825, 1.545, 3");
        index_2 ("0.0275, 0.0358, 0.0524, 0.0856, 0.152, 0.2848, 0.55");
        values ( \
          "0.137081, 0.182511, 0.273648, 0.454886, 0.816747, 1.5399, 2.98395", \
          "0.134285, 0.180146, 0.271656, 0.45348, 0.815519, 1.53916, 2.98357", \
          "0.12622, 0.172893, 0.265303, 0.448603, 0.812201, 1.53658, 2.98196", \
          "0.104768, 0.153176, 0.248546, 0.434988, 0.802701, 1.52955, 2.97739", \
          "0.047762, 0.099884, 0.202154, 0.396617, 0.773335, 1.51029, 2.96357", \
          "0.078644, 0.021338, 0.089133, 0.298237, 0.692397, 1.44976, 2.92269", \
          "0.364571, 0.300658, 0.17897, 0.045831, 0.480675, 1.28133, 2.80204");
      }

Anyone knows why?

Thanks in advance!