Two-dimensional position detection system with MEMS accelerometers, readout circuitry, and microprocessor for padless mouse applications

Seungbae Lee, Gi Joon Nam, Junseok Chae, H. Kim, A. J. Drake

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

A hybrid two-dimensional position sensing system is designed with microelectromechanical systems (MEMS) for padless mouse applications. The X/Y-axis acceleration of the user's hand movements is measured by two MEMS accelerometer devices. These acceleration values are pulsewidth modulated and converted into (X, Y) coordinates on the screen by integral operations on a microprocessor. The overall system consists of four major components: 1) MEMS accelerometers; 2) CMOS analog readout circuitry; 3) an acceleration magnitude extraction module; and 4) a 16-b RISC microprocessor. Mechanical and analog simulation shows that the designed mouse system can detect acceleration as small as 5.3 mg (g=9.8 m/s/sup 2/) with 100-kHz sampling frequency for low power consumption.

Original languageEnglish (US)
Pages (from-to)1167-1178
Number of pages12
JournalIEEE Transactions on Very Large Scale Integration (VLSI) Systems
Volume13
Issue number10
DOIs
StatePublished - Oct 2005

Keywords

  • 2D position detection system
  • Acceleration magnitude extraction module
  • CMOS analog readout circuitry
  • Hybrid 2D position sensing system
  • MEMS accelerometers
  • Microelectromechanical systems
  • Microprocessors
  • Padless mouse applications
  • Pulsewidth modulation

ASJC Scopus subject areas

  • Software
  • Hardware and Architecture
  • Electrical and Electronic Engineering

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