| 摘要 |
The phases of distortions of a signal outputted from an amplifier are measured. A phase measurement device measures an output of an amplifier when an input signal having input frequency components omega 10 and omega 20 is fed to the amplifier. The phase measurement device includes multipliers for orthogonally transforming the output of the amplifier by means of omegac, a phase acquisition section for acquiring phases theta 1 and theta 2 of the input frequency components omega 10 and omega 20 in the output of the multipliers, and theta 3 and theta 4 (third distortion), and theta 5 and theta 6 (fifth distortion) of the distortion components, a match time/phase measurement section for measuring a match time point Deltat when theta 1 and theta 2 match each other according to the acquisition result of the phase acquisition section, and a distortion component phase measurement section for measuring phases theta 3 to theta 6 of the distortion components at the match time point Deltat according to the acquisition result of the phase acquisition section. The phase acquisition section acquires at least one of theta 1 and theta 2 , and theta 3 and theta 5 (with the frequencies higher than those of theta 1 and theta 2 ) or theta 4 and theta 6 (with the frequencies lower than those of theta 1 and theta 2 ).
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