📢 Too many exams? Don’t know which one suits you best? Book Your Free Expert 👉 call Now!

    Question

    Which statement is FALSE for PLL used for demodulation

    of FM?
    A PLL uses feedback system thus increase the bandwidth. Correct Answer Incorrect Answer
    B PLL uses feedback to reduce noise power at output of demodulator. Correct Answer Incorrect Answer
    C A PLL demodulator uses negative feedback system for demodulation. Correct Answer Incorrect Answer
    D PLL uses feedback system thus reducing the bandwidth. Correct Answer Incorrect Answer

    Solution

    In a Phase-Locked Loop (PLL) used for FM demodulation, the loop operates as a negative feedback system. Its main advantage is that it reduces noise power at the demodulator output, which makes PLL-based FM demodulation superior to simple slope detection. However, PLL does not increase the bandwidth; instead, the loop bandwidth is controlled and usually limited to track the FM signal while rejecting unnecessary noise. So, the false statement is: “PLL uses feedback system thus increase the bandwidth.”

    Practice Next
    More IT Operating System Questions

    Relevant for Exams:

    ask-question