公开(公告)号：US07349672B2

公开(公告)日：2008-03-25

申请号：US10782097

申请日：2004-02-19

申请人： Masaaki Noda ,  Osamu Asayama ,  Hiroshi Ando ,  Hideaki Ueda ,  Mitsuru Kaito

发明人： Masaaki Noda ,  Osamu Asayama ,  Hiroshi Ando ,  Hideaki Ueda ,  Mitsuru Kaito

IPC分类号： H04B1/38

CPC分类号： H04B1/0475 ,  H04B1/403

摘要： A digital signal transceiver includes a frequency modulator for outputting a high-frequency signal frequency-modulated with a digital signal input thereto, a power amplifier, an antenna terminal, and an antenna switch. The antenna switch includes a first branch port for receiving a signal output from the power amplifier, a common port connected to the antenna terminal, said common port being connected to the first branch port in the transmitting mode, and a second branch port connected to the common port in the receiving mode. The transceiver further includes a filter having an input port thereof connected to the second branch port of the antenna switch, a high-frequency amplifier having an input port thereof connected to an output port of the filter, and a mixer for mixing a signal output from the high-frequency amplifier with the signal output from the frequency modulator.

摘要翻译： 数字信号收发器包括：频率调制器，用于输出用输入的数字信号进行频率调制的高频信号，功率放大器，天线端子和天线开关。 天线开关包括用于接收从功率放大器输出的信号的第一分支端口，连接到天线端子的公共端口，所述公共端口以发送模式连接到第一分支端口，第二分支端口连接到 公共端口处于接收模式。 收发器还包括一个滤波器，其输入端口连接到天线开关的第二分支端口，高频放大器的输入端口连接到滤波器的输出端口，混频器用于混合来自 高频放大器具有从调频器输出的信号。