| 摘要 |
The demodulator for demodulation and separation of the individual components of a digitalised stereo multiplex signal has at least one quadrature demodulator (q1), with 2 digital demodulators (M1, 15!2)!supplied!with!a!decimised!signal!mixture!(ds')!and!a digitalised sinusoidal carrier (t1) or a cosine carrier (t2) respectively. Further carriers (t3, t4, t5) supplied as a data word sequence are fed to 3 further digital demodulators (M3, M4, 15!5),!2!of!which!form!a!second!quadrature!demodulator!(q2). The signal sampling frequency is matched to the digitalisation frequencies of the carriers (t1...t5) via a number of decimisation circuits (d1-d3). The output signal components are provided via respective low-pass filters (61...66).
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