| 摘要 |
<P>PROBLEM TO BE SOLVED: To integrate a plurality of tuners into one unit by enhancing shield among the plurality of tuners, and to make the tuners operable simultaneously. <P>SOLUTION: A tuner unit comprises: a circuit board in which a first tuner circuit and a second tuner circuit are mounted, the circuit board having a through hole therebetween; and a shield portion shielding the first and second tuner circuits and engaging with the through hole of the circuit board. The shield portion has a double structure including: a first shield portion which engages with the through hole and is arranged on the first tuner circuit side in order to shield the first tuner circuit; and a second shield portion which engages with the through hole and arranged on the second tuner circuit side in order to shield the second tuner circuit. The through hole is provided between the second tuner circuit and any one of the antenna tuning circuit, the high frequency tuning circuit or the IF conversion circuit of the first tuner circuit. <P>COPYRIGHT: (C)2012,JPO&INPIT |
