| 摘要 |
PURPOSE: A radio transceiver for a mobile communication terminal is provided to implement a hands-free function for a communication between a hands-free device and the terminal using a radio frequency, by adopting a processing device of a microcomputer, thereby simplifying a circuit for the transceiver and reducing power consumption and enabling a full duplex transmission. CONSTITUTION: A first transceiver(200) is connected to a mobile communication terminal(100) via a line so that it can be held in a purse or a bag. A second transceiver(300) can communicate with the first transceiver(200) by a radio frequency. The first transceiver(200) includes a curl code(210) with an antenna function. The second transceiver(300) includes a switch button(310) pressed for initiating and ending the communication, an earphone(320) and a necklace line as an antenna. A connector(220) of the first transceiver(200) is coupled to an input and output terminal(110) for a voice signal in the terminal(100). A ground line(213) is inserted in the curl code(210), such that it is commonly connected to signal lines(211,213) which are coupled to the input and output terminal(110). |
