DETECTOR FOR AMPLITUDE AND PHASE

摘要

PURPOSE:To obtain a detector for amplitude and phase by which the amplitude and phase of AC signal can be detected at a high speed without phase delay. CONSTITUTION:The frequency of AC signal v detected by a AC signal detecting means 4 is used to calculate the AC signal whose phase is changed in only phase characteristic phi through a calculation circuit 14 having a specified phase characteristic phi, and at the same time a cosine of phase characteristic phi is multiplied to the AC signal v detected by the means 4 and the result that the AC signal having a changed phase is subtracted from the multiplied result is multiplied with an inverse number of a sine of the phase characteristic phi.