Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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An A/D Conversion System for Precision Weighing Signal Process

정밀 중량 계측 신호처리를 위한 A/D 변환 시스템

  • Joo, Yong-Kyu (Dept. of Electrical Engineering, Kangwon National University) ;
  • Jeon, Chan-Min (Dept. of Electrical Engineering, Kangwon National University) ;
  • Park, Chan-Won (Dept. of Electrical Engineering, Kangwon National University)
  • 주용규 (강원대학교 전기공학과) ;
  • 전찬민 (강원대학교 전기공학과) ;
  • 박찬원 (강원대학교 전기공학과)
  • Published : 2002.11.30
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Abstract

This paper has been studied an A/D conversion system for precision weighing signal process In weighing system. A/D conversion has some problem.; offset drift voltage with environment situation and nonzero value of initial output voltage. The Offset voltage in analog circuit produces a drift of an output voltage before A/D conversion stage. This paper suggested the method of reducing the offset voltage by switching analog chopping circuit and making the initial output close to zero to enhance the swing range by D/A converter. Also, we have designed active filter and digital filter with Auto Zero Tracking algorithm for better signal process of the weighing system.

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