| 摘要 |
An RFID transceiving system is provided to selectively process various RFID signals in one system without discriminating various products according to an RFID frequency assigned to each region by improving a part of a circuit structure of a transceiving end. A phase synchronization circuit unit(160) differentially generates a reference frequency signal according to a type of the RFID frequency assigned to each country. A transmitter(110) mixes a transmission signal and the reference frequency signal, and transmits the mixed transmission signal. A receiver(140) selectively filters the received signal according to the RFID frequency assigned to each country and selectively mixes the reference signal. The phase synchronization circuit unit differentially generates the reference frequency signal through a plurality of phase synchronization circuits(162-164), and includes a switch(130) connected to the phase synchronization circuits and selectively transferring the reference frequency signal. |
