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EEE2013 Practice Digital Electronics Assignment 2018
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Exam (5 questions) in EEE2013 Digital Electronics by Graeme Chester and 1 other

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Graeme's copy of Amplitude Modulation
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Question in Graeme's workspace by Graeme Chester

This question plots a general amplitude modulated carrier signal defined by $v_s(t) = (V_{DC} + V_m \cos(2\pi f_m t))\cos(2\pi f_c t)$ , where $V_{DC}$ is a DC offset, $V_m$ is the message amplitude, $f_m$ is the message frequency and $f_c$ is the carrier frequency ( $f_c = 20f_m$ in this question). The student must identify the values of $V_{DC}$ and $V_m$ and enter these values into the appropriate gaps in the equation of the AM signal.

Graeme Chester