Title

Design Of Time-Based ADC Using GROSC-Based TDC For Wireline Data Communications

Alternative Title

유선 데이터 통신을 위한 게이티드 링 오실레이터 기반 시간-디지털 변환기를 이용한 시간 기반 아날로그-디지털 변환기 설계

DGIST Authors

Jaemin Lee ; Gain Kim

Advisor

김가인

Issued Date

2026

Awarded Date

2026-08-01

Type

Thesis

Description

Analog-to-digital converter （ADC）, voltage-to-time converter （VTC）, time-to-digital converter （TDC）, gated-ring oscillator （GROSC）, time-interleaving （TI）.

Table Of Contents

Ⅰ. Introduction 1
1.1 Background and Motivation 1
1.2 Thesis Organization 2

ⅠⅠ. Background of Analog-to-Digital Converter （ADC） 3
2.1 ADC Fundamentals 3
2.2 ADC Metrics 4
2.2.1 Sampling Rate 4
2.2.2 Resolution 4
2.2.3 Power Consumption 4
2.2.4 Signal to Noise Ratio （SNR） 5
2.2.5 Signal to Noise and Distortion Ratio （SNDR） 5
2.2.6 Effective Number of Bits （ENOB） 6
2.2.7 Spurious-Free Dynamic Range （SFDR） 6
2.2.8 Walden Figure-of-Merit 7
2.2.9 Differential / Integral Non-Linearity （DNL/INL） 7
2.3 High-Speed ADC Architecture 8
2.3.1 Flash ADC 8
2.3.2 Successive Approximation Register （SAR） ADC 10
2.3.3 Pipelined ADC 11
2.3.4 Time-Based ADC 12

III. 8-bit Time-Based ADC Using GROSC-Based TDC Design 14
3.1 Motivation 14
3.2 System Architecture Overview 15
3.3 Circuit Implementation 17
3.3.1 Track and Hold Switch 17
3.3.2 Comparator 19
3.3.3 Capacitive Digital-to-Analog Converter （CDAC） for Offset Time 20
3.3.4 Voltage-to-Time Converter （VTC） 22
3.3.5 Gated-Ring Oscillator （GROSC） 23
3.3.6 Counter and Buffer Latency Correction 25
3.3.7 Phase Interpolator （PI） 27
3.3.8 Cyclic-Thermometer-to-Binary （CTH2B） Logic 28
3.4 Measurement Results 29

IV. 8-bit Flash-Assisted Time-Based ADC （FA-TB-ADC） Design 32
4.1 Motivation 32
4.2 System Architecture Overview 32
4.3 Circuit Implementation 34
4.3.1 Flash-Assisting Block 34
4.3.2 Bipolar Voltage-to-Time Converter （BVTC） 34
4.4 Simulation Results 35

V. Conclusion 36

URI

https://scholar.dgist.ac.kr/handle/20.500.11750/60820
http://dgist.dcollection.net/common/orgView/200001007630

DOI

10.22677/THESIS.200001007630

Degree

Master

Department

Department of Electrical Engineering and Computer Science

Publisher

DGIST

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