Official PYQ · 2004Set 1 · Q76Analog CommunicationsMCQ1 mark

GATE EC 2004 Set 1 Q76 — Analog Communications

A $100 \; \mathrm{MHz}$ carrier of $1 \mathrm{~V}$ amplitude and a $1 \; \mathrm{MHz}$ modulating signal of $1 \mathrm{~V}$ amplitude are fed to a balanced modulator. The output of the modulator is passed through an ideal high-pass filter with cut-off frequency of $100 \; \mathrm{MHz}$ . The output of the filter is added with $100 \; \mathrm{MHz}$ signal of $1 \mathrm{~V}$ amplitude and $90^{\circ}$ phase shift as shown in the given figure. The envelope of the resultant signal is

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Published 10 Oct 2026

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