Chapter 487

Precision LVDT signal conditioning using direct RMS to DC conversion

Cheng-Wei Pei


Precision linear variable differential transformer (LVDT) signal conditioning using direct RMS to DC conversion is discussed.


Linear variable differential transformer


LVDT signal conditioning



Linear variable differential transformers (LVDTs) are theoretically infinite-resolution displacement measurement devices. An LVDT operates by comparing the magnetic flux coupled into two transformer secondary windings to determine the displacement of a moving transformer core. A low distortion sine wave acts as the input. The amplitude and phase of the output signal across the two secondary windings determine ...

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