| 摘要 |
PROBLEM TO BE SOLVED: To constitute a television tuner compactly including the sections for demodulating an analog television signal and a digital television signal arranged at a segment in a specific channel, respectively. SOLUTION: An analog intermediate frequency block 50 comprises a 4.5 MHz detection circuit 54 receiving at least a voice intermediate frequency signal, and an oscillator 56 outputting oscillation signals for video image detection and 4.5 MHz detection. When a digital television signal is received, a digital intermediate frequency signal and an oscillation signal are inputted to the 4.5 MHz detection circuit 54 where the digital intermediate frequency signal is down converted to 4.5 MHz and the down converted digital intermediate frequency signal is inputted to a digital intermediate frequency block 60. COPYRIGHT: (C)2006,JPO&NCIPI
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