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    Frequency modulation is a type of modulation where the frequency of the carrier is varied in accordance with the modulating signal. The amplitude of the carrier remains constant.

    The information-bearing signal (the modulating signal) changes the instantaneous frequency of the carrier. Since the amplitude is kept constant, FM modulation is a low-noise process and provides a high quality modulation technique which is used for music and speech in hi-fidelity broadcasts.

    In addition to hi-fidelity radio transmission, FM techniques are used for other important consumer applications such as audio synthesis and recording the luminance portion of a video signal with less distortion.

    There are several devices that are capable of generating FM signals, such as a VCO or a reactance modulator.

    Frequency Modulation is abbreviated FM.

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    One comment
    1. Evans Obita

      10 March, 2011 at 9:50 am

      Please connect it to my facebook a/c.

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