| 摘要 |
PROBLEM TO BE SOLVED: To reduce section areas in a metallic frame body constituting a television tuner unit and to miniaturize the television tuner unit. SOLUTION: Input tuning circuits 20 and 21 are provided in a first section area 11e, and high frequency amplification circuits 22 and 24 and inter-stage tuning circuits 23 and 25 are provided in a second section area 11f, and an integrated circuit 26 which converts a frequency into an intermediate frequency signal and detects the intermediate frequency signal to output a video signal and a sound signal is provided in a third section area 11g, and at least mixing circuits 27 and 29 to which television signals outputted from the inter-stage tuning circuits 23 and 25 are outputted, oscillation circuits 28 and 30 which input local oscillation signals to the mixing circuits 27 and 29, a PLL circuit 31 which sets the frequencies of the local oscillation signals, a plurality of stages of intermediate frequency amplification circuits 32 and 33 for amplifying the intermediate frequency signal, and a video detection circuit 34 and a sound detection circuit 35 which detect the amplified intermediate frequency signal to output the video signal and the sound signal are constituted in the integrated circuit 26. COPYRIGHT: (C)2003,JPO
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