아날로그-디지털 변환회로

아날로그-디지털 변환회로
:연속된 아날로그 신호
아래:이산화된 디지털 신호

아날로그-디지털 변환회로A/D 컨버터(Analog-to-digital converter) 또는 간단하게 ADC라 하며, 아날로그 전기 신호를 디지털 전기 신호로 변환하는 전자 회로이다.[1][2]

아날로그 신호는 저장이나 조작의 편리성이 디지털 신호보다 어렵기 때문에, 초기의 전자공학과는 달리 현재는 디지털화를 많이 한다. 신호전송 시, 일반적으로 아날로그 신호를 디지털 신호를 변환되면 신호의 잡음등에 유리하다. 단지 변환 시 생기는 왜곡은 감수해야 한다. 따라서 아날로그를 디지털화하여 신호를 조작하고 다시 디지털-아날로그 변환회로(DAC)을 통해 아날로그로 변환한다.

예를 들어 초기의 전화기는 아날로그방식으로 신호를 전송하였다. 교환망이 진화하면서 음성신호를 PCM방식으로 디지털화 하고 이것을 전송하고 수신측에서 다시 아날로그로 디코딩 한다.

변환 방식

아날로그-디지털 변환회로의 방식
이름 speed Resolution 특징 용도
플래시형
(병렬 비교형)
10G~10M 12~6 고속, 대규모 고속 측정기
파이프라인형 150M~10M 14~8 영상 신호처리
축차 비교형 1M~10k 16~8 낮은 소비전력 마이크로프로세서
델타시그마형 100k~100M 24~18 높은 분해력 음성 처리
이중 적분형 1k~10 22~12 고정밀 측정기

전기 기호

같이 보기

각주

  1. 《Data Conversion Handbook》 (PDF). 2018년 4월 28일에 확인함. [깨진 링크(과거 내용 찾기)]
  2. 《Principles of Data Acquisition and Conversion》 (PDF). Texas Instruments. April 2015. 2016년 10월 18일에 확인함. 

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