FM Demodulators For BTSC Stereo (1988)

By Luis A. Rovira, Scientific-Atlanta, Inc

Of the many kinds of FM demodulators, two types have been commonly used to demodulate television aural carriers modulated with BTSC stereo: quadrature demodulators and pulse-count demodulators. These two types of demodulators are described. Waveform plots are used to illustrate the operation in a qualitative and intuitive way. The relative advantages and disadvantages are discussed. In particular, cost/circuit complexity, noise, and sources of distortion are considered in some detail. The effect of these parameters on BTSC stereo is discussed.

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