본 논문은 우주 망원경의 이미지 센서를 위한 극저온 에너지 가변형 비교기를 제안한다. 제안하는 비교기는 기존 부동 인버터 증폭기의 고속 비교속도, 높은 전류 효율 (gm/ID), 그리고 공통모드제거 기능을 가지면서 동시에 전압제어발진기 기반 비교기의 에너지 가변성을 지닌다. 제안하는 비교기는 65 nm 공정으로 11-bit 극저온-CMOS SAR ADC에 구현되었으며, 해당 ADC는 5 MS/s의 샘플링 속도에서 65.2 dB의 SNDR과 174 dB의 Schreier FoM (FoMS)을 지닌다.
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