| 摘要 |
<P>PROBLEM TO BE SOLVED: To reproduce a data signal which is not deteriorated even when a level of a receiving signal varies largely due to a noise mixture or the like. <P>SOLUTION: In the radio wave receiving apparatus 620, an over-input controlling circuit 632 detects whether a signal (a) received by a receiving antenna 621 and amplified by an RF amplifying circuit 622 exceeds a dynamic range or a comparison voltage value of the radio wave receiving apparatus 620. When it exceeds, a control signal (b) to deteriorate (attenuate) an amplification factor of the RF amplifying circuit 622 is generated and output according to the exceeding level of the dynamic range or the comparison voltage value of the signal (a), and also a control signal (c) to increase the amplification factor in an enhanced circuit 626 by a part of the attenuation of the amplification factor of the RF amplifying circuit 622 by the control signal (b) is generated and output. <P>COPYRIGHT: (C)2007,JPO&INPIT |
