Abstract
Ring voltage-controlled-oscillators (VCOs) are increasingly being used to design δσ ADCs. They have the merits of simple, highly digital and low-voltage tolerant, making them attractive alternatives for the classic scaling-unfriendly operational-amplifier-based methodology. This paper aims to provide a summary on the advancement of VCObased δσ ADCs. The scope of this paper includes the basics and motivations behind the VCO-based ADCs, followed by a survey covering a wide range of architectures and circuit techniques in both continuous-time (CT) and discrete-time (DT) implementation, and will discuss the key insights behind the contributions and drawbacks of these architectures.
Original language | English (US) |
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Pages (from-to) | 509-529 |
Number of pages | 21 |
Journal | IEICE Transactions on Electronics |
Volume | E102C |
Issue number | 7 |
DOIs | |
State | Published - 2019 |
Externally published | Yes |
Keywords
- Analog-to-digital converter
- Ring oscillator
- Time-domain signal processing
- VCO-based ADC
- Voltage-controlled-oscillator
- δσ ADC
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering