23/51 4.3 Relative Displacement:Translational and Rotational IV.Differential Transformers High 0 000 Excitation- eo voltage Ground source Low (a)Using balanced Voltage Source Excitation- voltage source (b)Using balanced Resistor Networks_ Figure 4.20 Methods for Null Reduction 24/51 4.3 Relative Displacement:Translational and Rotational IV.Differential Transformers eab Core below null ore nul eo eob+ecd R≈1,000to10,0002 Core above null Figure 4.21(c)Demodulation4.3 Relative Displacement: Translational and Rotational IV. Differential Transformers Figure 4.20 Methods for Null Reduction (a) Using balanced Voltage Source (b) Using balanced Resistor Networks 23/51 4.3 Relative Displacement: Translational and Rotational IV. Differential Transformers Figure 4.21 (c) Demodulation 24/51