| 摘要 |
PROBLEM TO BE SOLVED: To provide a transmission/reception circuit, a semiconductor integrated circuit device and radio equipment for communication which can combine low loss in transmission with low loss in reception. SOLUTION: The transmission/reception circuit includes a transmission circuit block, a reception circuit block, an antenna circuit block having an antenna input/output terminal, a first selection means for selecting a transmission state and a reception state, and a first matching circuit for matching a second selection means and the reception circuit block in the reception state. The antenna circuit block is connected to the transmission circuit block and the first selection means at the antenna input/output terminal, the other end of the first selection means is connected to the reception circuit block, the second selection means is connected in a shunt between them, and the first matching circuit is connected to the other end of the second selection means. COPYRIGHT: (C)2007,JPO&INPIT
|
