A Survey of Voltage-Controlled-Oscillator-Based ?∑ ADCs  

作　　者：Yi Zhong Nan Sun 

机构地区：[1]Department of Electronic Engineering,Tsinghua University,Beijing 100084,China [2]Department of Electrical and Computer Engineering,The University of Texas at Austin,Austin,TX 78712,USA

出　　处：《Tsinghua Science and Technology》2022年第3期472-480,共9页清华大学学报（自然科学版（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China (Nos. 61934009 and 62090042);Beijing National Research Center for Information Science and Technology, Beijing Innovation Center for Future Chips (ICFC);the Academician Expert Open Fund of Beijing Smart-chip Microelectronics Technology Co., Ltd.

摘　　要：The benefits of technology scaling have fueled interest in realizing time-domain oversampling(?∑) of Analog-to-Digital Converters(ADCs). Voltage-Controlled Oscillators(VCO) are increasingly used to design ?∑ADCs because of their simplicity, high digitization, and low-voltage tolerance, making them a promising candidate to replace the classical Operational Transconductance Amplifier(OTA) in ?∑ ADC design. This work aims to provide a summary of the fully VCO-based ?∑ ADCs that are highly digital and scaling-friendly. This work presents a review of first-order and high-order VCO-based ?∑ ADCs with several techniques and architectures to mitigate the nonidealities introduced by VCO, achieving outstanding power efficiency. The contributions and drawbacks of these techniques and architectures are also discussed.

关 键 词：Voltage-Controlled Oscillator(VCO) Analog-to-Digital Converter(ADC) oversampling(?∑)ADC time-domain signal processing VCO-based?∑ADC 

分 类 号：TN752[电子电信—电路与系统]