| 摘要 |
<p>Disclosed is a circuit which adjusts the phase of an IQ local signal. With respect to a local signal (A) and a local signal (B) which are generated by a local generating section with the intention of generating IQ-orthogonal local signals, a local signal (A2) is obtained by adding the local signal (B) having adjusted gain to the output of the local signal (A), and a local signal (B2) is obtained by subtracting the local signal (A) having adjusted gain from the output of the local signal (B). Even if the phase relationship of the local signal (A) and the local signal (B) has deviated from 90°, the phase difference of the local signal (A2) and the local signal (B2) can be readily adjusted by altering the amount of adjustment of the gains of variable amplifiers (AMP 1, AMP 2).</p> |
