C1.4 - MHz-Range Interface for Inductive Displacement Sensors

Mohammad Reza Nabavi & Stoyan Nihtianov
This paper presents a high performance electronic interface for eddy current displacement sensors (ECSs). The interface includes a low-power front-end oscillator specifically designed for high-stability performance. The demodulation principle used to detect the input signal (i.e., displacement information) is explained. A switched-channel technique is utilized to suppress the effect of the offset. Post layout simulations confirm the effectiveness of the design approach as well as the validity of the theoritical analyses. The interface system dissipates...