TRANSMISSION CONTROL SIGNAL RECEIVING CIRCUIT, TRANSMISSION CONTROL SIGNAL RECEIVER, AND TERRESTRIAL DIGITAL TELEVISION BROADCAST RECEIVER USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a transmission control signal receiving circuit capable of receiving transmission control signals with a simple circuit configuration, a transmission control signal receiver and a terrestrial digital television broadcast receiver using the same. SOLUTION: The transmission control signal receiving circuit receiving transmission control signal carriers of a terrestrial digital television broadcast, and demodulating transmission control signals from the transmission control signal carriers comprises: a quadrature demodulation circuit 42 that quadrature-demodulates reception signals using the frequency signals set to be a central frequency of two transmission control signal carriers, a transmission control signal carrier receiving circuit 44 that simultaneously receives the two transmission control signal carriers from the output signal of the quadrature demodulation circuit, using the frequency signal set to be the frequency 1/2 of difference of two transmission control signal carriers; and a detection circuit 46 for detecting two transmission control signal carriers received by the transmission control signal carrier receiving circuit. COPYRIGHT: (C)2007,JPO&INPIT