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+//OptoElectronics and Fibre Optics Communication, by C.K Sarkar and B.C Sarkar
+//Example 6.9
+//OS=Windows 10
+////Scilab version Scilab 6.0.0-beta-2(64 bit)
+clc;
+clear;
+
+//given
+tf=8e-12;//electron transit time in second
+G=60//photoconductive gain of the device
+
+Bm=1/(2*%pi*tf*G);//the maximum 3dB bandwidth in Hz
+mprintf("The 3dB bandwidth is=%.2f MHz",Bm/1e6);//division by 1e6 to covert unit from Hz to MHz
+//The answer in textbook is wrong