| 摘要 |
PURPOSE:To measure a balanced voltage in a detection section immediately by dividing a voltage detected by a Schering bridge circuit into the sine wave component and the cosine wave component so that they are added together after squared separately to obtain a value large enough to be independent on the time. CONSTITUTION:After amplifier with an amplifier 2 a voltage detected by a detection section of a Schering bridge circuit is converted into an Asinomegat and an Acosomegat equal in the amplitude with a sine circuit 3 and a cosine circuit 4. The components of the voltage thus converted are each introduced to a square circuit 5 to square and added together with an addition circuit 6 to obtain a value A<2> not containing any time change. The output A<2> being closer to zero means that the detection voltage of the Schering circuit comes closer to zero. Thus, the equilibrated point of the Schering bridge circuit can be adjusted quickly by measuring the output A<2>. |
