| 摘要 |
<p>A receiving apparatus for receiving digital broadcasting of the one frequency band and the other frequency band has a local oscillation circuit for generating a first local oscillation signal, and a frequency conversion circuit for frequency-converting the local oscillation signal to generate a second local oscillation signal. The received signal of the one frequency band is up-converted to a first intermediate frequency signal using any one of first and second local oscillation signals, and the received signal of the other frequency band is down-converted to the first intermediate frequency signal using the other local oscillation signal out of the first and second local oscillation signals. Further, the receiving apparatus has another local oscillation circuit for oscillating a local oscillation frequency used for frequency conversion of the first intermediate frequency signal to a second intermediate frequency signal, an A/D converter for A/D converting the second intermediate frequency signal, and a orthogonal demodulation circuit for extracting I-component data and Q-component data from the A/D converted signal and for digital-converting the data. <IMAGE></p> |
