Satellite broadcasting converter, control circuit...

Telecommunications – Wireless distribution system – Receiver for satellite broadcast

Reexamination Certificate

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Details

C455S188100, C348S735000, C324S076410

Reexamination Certificate

active

07426368

ABSTRACT:
In a broadcasting satellite converter adapted to be connected to a BS tuner and fed with a power supply voltage signal from the broadcasting satellite tuner, a receiver circuit includes a mixer, and a plurality of local oscillators connected to the mixer to convert broadcasting satellite signals into intermediate frequency signals. The receiver circuit is controlled by a control circuit including a detector circuit and a selector circuit. The detector circuit detects whether a band switching pulse signal is superimposed on the pulse signal, and has a period counting circuit that produces numerical count data representing a period of a frequency of the band switching pulse signal. The selector circuit selectively drives one of the local oscillators in accordance with the numerical count data obtained in the detector circuit.

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