sig_gen: Fixed error in AM modulation
sig_gen: Fixed error in AM modulation

BinPy/BinPy,rajathkumarmp/BinPy,yashu-seth/BinPy,yashu-seth/BinPy,BinPy/BinPy,rajathkumarmp/BinPy,daj0ker/BinPy,daj0ker/BinPy