Patent ID: 7466141

Claim:
A phase measurement device that measures an output from a circuit to be measured upon feeding an input signal having at least two input frequency components to the circuit to be measured, comprising: a phase acquisition section that acquires phases of the input frequency components and a distortion component based upon a local frequency; a match time measurer that measures a match time at which the phases of the input frequency components match each other based upon an acquired result of said phase acquisition section; and a distortion component phase measurer that measures a phase of the distortion component at the match time based upon an acquired result of said phase acquisition section, wherein the distortion component includes at least either of a high frequency distortion component that has a frequency higher than the input frequency components, and a low frequency distortion component that has a frequency lower than the input frequency components, and said phase acquisition section acquires both or either of a highest frequency component and a lowest frequency component of the input frequency components, and a phase of the high frequency distortion component or the low frequency distortion component.