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GATE ECE 2005 | Question-22

Find the correct match between group $1$ and group $2.$
Group I
$\begin{array}{l}
\mathrm{P}-\{1+k m(t)\} \mathrm{A} \sin \left(\omega_{c} t\right) \\
\mathrm{Q}-k m(t) \mathrm{A} \sin \left(\omega_{c} t\right) \\
\mathrm{R}-\mathrm{A} \sin \left\{\omega_{c} t+k m(t)\right\} \\
\mathrm{S}-\mathrm{A} \sin \left(\omega_{c} t+k \int_{-\infty}^{t} m(t) d t\right)
\end{array}$

Group Il
$\mathbf{W}$ - Phase modulation
$\mathbf{X}$ - Frequency modulation
$\mathbf{Y}$ - Amplitude modulation
$\mathbf{Z}$ - DSB-SC modulation

  1. $\mathrm{P}-\mathrm{Z}, \mathrm{Q}-\mathrm{Y}, \mathrm{R}-\mathrm{X}, \mathrm{S}-\mathrm{W}$,
  2. $\mathrm{P}-\mathrm{W}, \mathrm{Q}-\mathrm{X}, \mathrm{R}-\mathrm{Y}, \mathrm{S}-\mathrm{Z}$,
  3. $\text{P – X, Q – W, R – Z, S – Y,}$
  4. $\text{P – Y, Q – Z, R – W, S – X,}$
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