Question: Fig. 1 shows a square wave against time in msec. If the signal passes through a low-pass filter of cut-off frequency of 70Hz, how would

Fig. 1 shows a square wave against time in msec. If the signal passes through a low-pass filter of cut-off frequency of 70Hz, how would the signal looks like after the filter? (Answer using Fig. S1).

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5.0- 2.5 0.0- -2.5 -5.0- SPECTRUM www 0 25 50 75 100 125 150 175 200 Fig 1 ms

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