| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve reliability and to prevent erroneous correction from being performed by stopping the correction of digital signals in a fixed period from the changeover of a circuit positioned before an A/D converter. SOLUTION: A control part 2 on/of control a reception part 1 at the prescribed time and receive radio signal and the reception part 1 is not turned to a normal state in the fixed period after being turned to the on-state. Then, the control part 2 stops the function of a correction circuit 1f in the fixed period. Also, in the case that the transmission rate of base band signals, the is the transmission rate of reception signals, is changed, the control part 2 switches the cut-off frequency of a filter 1d corresponding to the transmission rate. In the fixed period after the control part 2 instructs the changeover of the cut-off frequency of the filter 1d, a phase difference is present in the base band signals outputted from the filtered 1d. Thus, the control part 2 stops the function of the correction circuit 6 in the fixed period from the changeover of the cut-off frequency as well.</p> |
