Broadcasting signal receiving apparatus and pulse counting demodulators

摘要

A broadcasting signal receiving apparatus includes a first signal receiving portion for receiving selectively frequency-modulated broadcasting signals to obtain a frequency-modulated intermediate frequency signal, a first band pass filter through which the frequency- modulated intermediate frequency signal passes, a first demodulator for frequency-demodulating the frequency-modulated intermediate frequency signal to obtain a first demodulation output signal, a second signal receiving portion for receiving selectively amplitude-modulated broadcasting signals to obtain an amplitude-modulated intermediate frequency signal, a second band pass filter through which the amplitude- modulated intermediate frequency signal passes, a second demodulator for amplitude-demodulating the amplitude-modulated intermediate frequency signal to obtain a second demodulation output signal, an output portion for obtaining a reproduced information output based on one of the first and second demodulation output signals, a signal supplying portion for supplying the first demodulator with the amplitude-modulated intermediate frequency signal when the reproduced information output based on the second demodulation output signal can be obtained from the output portions, and an operation controller for using a demodulation output signal obtained from the first demodulator under a condition in which the amplitude-modulated intermediate frequency signal is supplied to the first demodulator by the signal supplying portions for controlling selective reception of the amplitude-modulated broadcasting signals in the second signal receiving portion.