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IEICE TRANSACTIONS on Electronics

A Novel Displacement Sensor Based on a Frequency Delta-Sigma Modulator and its Application to a Stylus Surface Profiler

Koichi MAEZAWA, Umer FAROOQ, Masayuki MORI

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Summary :

A novel displacement sensor was proposed based on a frequency delta-sigma modulator (FDSM) employing a microwave oscillator. To demonstrate basic operation, we fabricated a stylus surface profiler using a cylindrical cavity resonator, where one end of the cavity is replaced by a thin metal diaphragm with a stylus probe tip. Good surface profile was successfully obtained with this device. A 10 nm depth trench was clearly observed together with a 10 µm trench in a single scan without gain control. This result clearly demonstrates an extremely wide dynamic range of the FDSM displacement sensors.

Publication
IEICE TRANSACTIONS on Electronics Vol.E106-C No.9 pp.486-490
Publication Date
2023/09/01
Publicized
2023/03/16
Online ISSN
1745-1353
DOI
10.1587/transele.2022ECS6013
Type of Manuscript
BRIEF PAPER
Category
Electronic Circuits

Authors

Koichi MAEZAWA
  University of Toyama
Umer FAROOQ
  University of Toyama
Masayuki MORI
  University of Toyama

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