Hi... I recently went through a paper that is uploaded here. The paper states that the time to peak is 1.2us, but when I input the same data from the paper in CST Studio Suite  for a double exponential, I get a time to peak of 2.1us. Why the discrepancy? Please explain. Also, it says +_ 50%, then also the values are far apart. Some snaps of the paper and CST calculations are provided for reference. Could someone help me out with this?