위상-인터폴레이터와 시간 증폭기를 사용한 2-step 시간-디지털 변환기의 설계
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This paper presents a high resolution, wide input range 2-step TDC used in ADPLL. TDC is used to compare the ADPLL output frequency with reference frequency and should be implemented with high resolution to improve the phase noise of ADPLL. 2-step TDC with phase-interpolation and Time Amplifier is proposed to meet the high resolution and wide input range.