| 摘要 |
<p>A direct conversion circuit includes first and second mixers to which a radio frequency signal is input, an oscillator for supplying the first and second mixers with local oscillation signals whose phases are orthogonal to each other, and a baseband processing circuit for processing baseband signals output from the first and second mixers are included, and a level-difference correcting circuit which, by changing relative levels of the radio frequency signal input to the first mixer and the radio frequency signal input to the second mixer, corrects the two baseband signals input to the baseband processing circuit so that the levels of both are equal to each other is provided in a stage before the first and second mixers.
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