Design and implementation of a high accuracy interpolation encoder ic for magnetic sensor

Wen Yu Chen, Yi Feng Zhang, Paul C.-P. Chao, Eka Fitrah Pribadi

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The magnetic encoder (ME) always employs sensor passing through periodic and equal distance grating and then generates periodic quadrature scaling signals for displacement measurement. The phase is relative to the movement. To improve encoder accuracy or resolution, electronic interpolation technique had been developed to subdivide the phase of quadrature scaling signals. According to the trends, this paper proposed a specific method with excellent noise immunity characteristic and a complete calibration process to improve the accuracy of the system. The designed circuit is taped-out using TSMC 0.18-μm CMOS process, where the active area is 1643 μm x 1676 μm. The chip has the specification of 3.3 V supply voltage, 20 MHz clock frequency, and 0.0859 mW power consumption. The accuracy of the measurement system is 1.065um.

Original languageEnglish
Title of host publicationASME 2019 28th Conference on Information Storage and Processing Systems, ISPS 2019
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791859124
DOIs
StatePublished - 27 Jun 2019
EventASME 2019 28th Conference on Information Storage and Processing Systems, ISPS 2019 - San Diego, United States
Duration: 27 Jun 201928 Jun 2019

Publication series

NameASME 2019 28th Conference on Information Storage and Processing Systems, ISPS 2019

Conference

ConferenceASME 2019 28th Conference on Information Storage and Processing Systems, ISPS 2019
CountryUnited States
CitySan Diego
Period27/06/1928/06/19

Keywords

  • Calibration
  • Displacement measurement
  • Interpolation circuit
  • Magnetic encoders

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