Topic: Communication Systems
In the given circuit, containing $A_{m}cos(\omega_{m}t)$, $A_{c}cos(\omega_{c}t)$ In-phase Power Divider, and $A_{m}sin(\omega_{m}t)$ with a $-\pi/2$ phase shift, $V_{out}$ is
- A. Upper Sideband $(\omega_{L}+\omega_{m})$
- B. Lower Sideband $(\omega_{L}-\omega_{m})$
- C. Both Upper and Lower Sideband $(\omega_{L}\pm\omega_{m})$
- D. None of above
Answer: B. Lower Sideband $(\omega_{L}-\omega_{m})$
Explanation: This is SSB-SC modulation with suppressed carrier using phase discriminator method. When the two signals apart from in-phase, then it is SSB-modulation with lower sideband $(\omega_{L}-\omega_{m})$.