InterviewSolution
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InterviewSolution
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`I-V` characterstic of four devices are shown in Fig. `15.1` Identify devices that can be used for modulation:A. `i` and `iii`B. only `iii`C. `ii` and some regions of `iv`D. All the devices can be used |
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Answer» Correct Answer - C A square law modulator is the device which can produce modulated waves by the apllication of message signal and the carrier wave. Square law modulator is used for modulation purpose. Charactersitics shown by (`i`) and (`iii`) correspond to linear devices. And by (`ii`) and same part of (`iv`) corresponds to square law device which shows non-linear relations. Hence (`ii`) and (`iv`) can be used for modulation. |
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