C1.4 - MHz-Range Interface for Inductive Displacement Sensors
- Event
- SENSOR+TEST Conferences 2009
2009-05-26 - 2009-05-28
Congress Center Nürnberg - Band
- Proceedings SENSOR 2009, Volume I
- Chapter
- C1 - Sensor Electronics I
- Author(s)
- M. Nabavi, S. Nihtianov - Technical University Delft, Delft, Netherlands
- Pages
- 269 - 274
- DOI
- 10.5162/sensor09/v1/c1.4
- ISBN
- 978-3-9810993-4-8
- Price
- free
Abstract
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 9.5 mW and demonstrates a dynamic range of 16 bits with a 240 µs measurement time and with less than 15 ppm/°C thermal drift over the range of 0-85 °C.