| 摘要 |
A signal processing device is provided to perform a switching process by automatically sensing a transmitting mode and a receiving mode to remove a need of separate voltage control, thereby realizing an easy designing process. A switching controller(110) comprises the following units. A coupler(113) receives a part of a transmission signal. A controller(115) converts the received signal into a DC component signal. The first voltage output unit(111) supplies the first control signal to a switching unit(105). The second voltage output unit(112) supplies the second control signal to the switching unit. The switching unit selects a transceiving route. The first filter unit(121) filters and transmits a transmission signal to the switching unit. The second filter unit(122) filters a receiving signal.
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