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LVDT Signal Conditioning

Aug 24th 1998

LVDT Signal Conditioning

An LVDT transformer is exited with a fixed frequency sine wave. The distance of displacement of the movable core will change the amplitude of the transformer output which is is converted to a dc voltage by the LT1967 True RMS converter. The direction of the core movement is indicated by the phase shift of the sine wave and is detected by a simple phase comparator circuit.

 

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