| 摘要 |
A phase shift circuit includes a 45° phase corrector that performs vector synthesis of signals supposed to have a 45° phase difference, out of a plurality of sets of orthogonal phase signals having an about 45° phase difference and an equal amplitude, the orthogonal phase signals in each set having undergone 90° phase correction, and outputs signals resulting from the vector synthesis, whereby a phase error between the orthogonal phase signals in the different sets is eliminated by the vector synthesis to make it possible to correct their phase difference to accurately 45°.
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