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fpga-based motor control

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cai2

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hi everyone...I am having a problem regarding with my project. I am using the fpga spartan3 kit, and i have made a program that controls the speed of a three phase induction motor control through varying its frequency. The program simulates successfully and the output waveform we expected was right. The problem is, when we try to connect the board to the oscilloscope, no waveform generates from it. What could be the problem?
 

Loading it seems... Use additional buffers for increaing the current at the output.
 

Use driver unit(TTL) logic for amplification of pulse from controller.......................
 

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