| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a radio apparatus which corrects deviation in frequency of an oscillation circuit. <P>SOLUTION: A switch 128, upon receiving a command about frequency automatic adjustment from an input terminal 123, makes change from an AFC part 119 side to an AFC part 127 side. While the switch 128 is selecting the AFC part 127 side, a frequency error of a base station side of another radio system is inputted from the AFC part 127, which is outputted to an adder 121. The adder 121, upon receiving the frequency error, reads a voltage set value having been written into a voltage set value area 125a of a storage part 125. A control amount of voltage corresponding to the frequency error is added to the voltage set value, and an updated voltage set value is outputted to a D/A conversion part 110. The D/A conversion part 110 converts the voltage set value from a digital signal to an analog signal, and outputs it to an oscillation circuit 111. The oscillation circuit 111 corrects a reference frequency by controlling voltage based on the voltage set value having been converted to the analog signal. <P>COPYRIGHT: (C)2012,JPO&INPIT |
