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