마이크로컨트롤러 포트의 3개 상태를 이용한 DAC 해상도 향상에 관한 연구
A Study on Enhancement of DAC Resolution using Three States of Micro-controller Port
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초록
본 논문에서는 마이크로컨트롤러 포트의 3개 상태 특성을 이용해 최소의 포트 수로 디지털-아날로그 변환결과의 해상도를 향상시키는 방법을 제시하였다. 제시한 방법의 타당성 검증을 위해 현재 사용되고 있는 2개상태 디지털로 이루어진 디지털-아날로그 변환회로를 분석하고, 제시한 3개 상태 방법과 비교 분석하였다. 제시한 방법의 효과를 입증하기 위해 실험회로를 구성하고 실험을 진행하였으며, 그 결과 기존의 2개 상태방법에 비해 2-비트 사용 시 해상도가 4단계에서 9단계로 225%, 3-비트 사용 시 8단계에서 27단계로 338% 크게 증가함을 확인하였다.
Abstract
In this paper, a method for improving the resolution of digital-to-analog conversion with the minimum number of ports using the three-state characteristics of micro-controller ports is presented. To verify the validity of the proposed method, a digital-to-analog conversion circuit consisting of two-state digital that is currently being used was analyzed and compared with the proposed three-state method. In order to prove the effectiveness of the proposed method, an experimental circuit was constructed and an experiment was conducted. As a result of the experiment, it was confirmed that the resolution increased by 225% from step 4 to step 9 when using 2 bits compared to the existing two-state method, and increased by 338% from step 8 to step 27 when using 3 bits.
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