MCQOPTIONS
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MCQOPTIONS
| 1. |
The signal x(t) = sin (200 πt) + 2 sin (400 πt) is modulated to produce a signal g(t) = x(t) sin (400 πt). This is passed through a low pass filter having a cut-off frequency of 400 π Hz and passband gain of 2. Then the output signal after the filter is |
| A. | 0 |
| B. | 0.5 sin (200 πt) |
| C. | cos (200 πt) |
| D. | 2 sin (200 πt) |
| Answer» D. 2 sin (200 πt) | |