Linear Variable Differential Transformer Circuit Diagram

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This is the linear variable differential transformer driver demodulator circuit diagram. A very simple motion transducer can be constructed using the circuit shown. The output is biased to one-half the supply voltage. This requires special interface circuitry for the signal readout. 

 Linear Variable Differential Transformer Circuit Diagram


Linear Variable Differential Transformer Circuit Diagram


One simple method is to use a zero center meter in a bridge configuration. Displacement now can be measured as a positive or negative meter reading. Readout sensitivity is a function of the particular linear variable differential transformer and of the gain of the error amplifier. De offsets can be nulled by using a simple offset adjustment circuit as indicated.
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