Question

To transmit a signal of frequency, $\omega_{m}$, with a carrier frequency, $\omega_{c}$ , in $AM$ transmission, the bandwidth of the filter and amplifier is

• A. $\omega_{m}$
• B. $2 \omega_{m}$
• C. $\omega_{c}$
• D. $\omega_{c} - \omega_{m}$
• E. $\omega_{c} + \omega_{m}$

Answer 1

Answer: (B)

Given, Transmitted frequency of signal $=\omega_{ m }$
Carrier frequency

The band width of the filter and amplifier.
$=\left(\omega_{m}-\omega_{e}\right)+\left(\omega_{m}+\omega_{e}\right) $
$=2\, \omega_{m}$