13. Determine the number of modes at a wavelength of 1.2 um in a a multimode fiber with a parabolic index profile, with a core diameter of 50 um, the core refractive index of 1.5 and cladding refractive index of 1.49. (a) 138 mode, (b) 125 Mode, (c) 128 mode, (d) Non of above

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Latches and Flip Flop

Just like logic gates, the latches and flip-flops are the important elements of an electronic circuit. The logic gates form the important part of combinatorial circuits, while the latches and flip-flops form the essential part of a sequential circuit. Sequential circuits form the important concept of automata theory in electronics and electrical engineering, these circuits are a kind of logic circuit whose output depends on both present input and past inputs, that is, the input history.