In the block diagram of a simple modulator, a square law device generates DC and sinusoidal of frequencies $ω_m, 2ω_m, ω_c, 2ω_c, ω_c – ω_m$ and $ω_c + ω_m$. The device which rejects dc and unwanted frequencies and retains frequencies, $ω_c, ω_c – ω_m$ and $ω_c + ω_m$ is called

Band pass filter

The correct answer is option (2) : Band pass filter

The device which reject dc and unwanted frequencies and retains frequencies, $ω_c, ω_c – ω_m$ and $ω_c + ω_m$ is called Band pass filter