| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a radiowave receiver including a small offset voltage-removing circuit with a simple configuration in the radiowave receiver for performing signal amplification processing of a plurality of stages. <P>SOLUTION: The radiowave receiver for receiving and demodulating a radiowave includes: IF amplifiers A1 and A2 for amplifying a received signal; a switch 32 for inputting the received signal to the IF amplifiers A1 and A2 intermittently; and an offset voltage-removing circuit 102 for removing offset voltage from the amplified signal, wherein the offset voltage-removing circuit 102 acquires and stores voltage outputted from the IF amplifiers A1 and A2 while no received signal is input to the IF amplifiers A1 and A2, and removes the offset voltage by determining a difference between the amplified signal and the stored voltage. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
