index_1("0.0100000000, 0.0230506000, 0.0531329000, 0.1224740000, 0.2823110000, 0.6507430000, 1.5000000000"); // input slew (ns)
index_2("0.0005000000, 0.0013283400, 0.0035289500, 0.0093752600, 0.0249070000, 0.0661697000, 0.1757910000"); // output capacitance (pF)