Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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A Design of Programmable Dual Slope A/D Converter by Single Chip Microprocessor

싱글칩 마이크로프로세서에 의한 프로그래머블 2중 적분형 A/D 변환기의 개발

  • Choi, G.S. (Dept. of Electrical Engineering, Kang Won National University) ;
  • Park, C.w. (Dept. of Electrical Engineering, Kang Won National University)
  • 최규석 (강원대학교 전기공학과) ;
  • 박찬원 (강원대학교 전기공학과)
  • Published : 1993.11.26
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Abstract

Offset voltage and drift characteristics of operational amplifier are critical factor to precision AID conversion System. In this study, a method is suggested to design the programmable A/D conversion system which has high resolution and low drift characteristics. First, hardware was designed to reduce the offset voltage of integrator and comparator, and analog switches are connected to reduce the drift characteristics of operational amplifier. And then, a calibration software technique was performed to obtain the stable data from A/D converter. The main advantage of our method is high precision A/D converter can be constructed with low cost and high confidence. Therefore proposed method is expected to be used in the industrial field where a high precision measurement is required.

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