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Welcome to the World of Single-Slope Column-Level Analog-to-Digital Converters for CMOS Image Sensors

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This monograph introduces the reader into basic and advanced aspects of single-slope analog-to-digital converters (SS-ADC) applied in solid-state image sensors.

Author(s): Albert Theuwissen Guy Meynants

Language: English
Pages: 74
Tags: CMOS image sensor

Introduction
Nice to Know and Need to Know
CMOS Image Sensor Architecture
CMOS Pixels
Noise Sources in a CMOS Pixel
Correlated-Double Sampling
Motivation to Use a Column-Level Analog-to-Digital Converter
Single-Slope ADC Architectures
Concept of the Single-Slope Analog-to-Digital Converter
Photon Shot Noise in an Image Sensor
Multi-Slope ADC
Multi-Ramp SS-ADC
Multi-Slope, Multi-Ramp ADC
Counting Single-Slope ADC
Counting SS-ADC with Digital Correlated Double Sampling
Counting SS-ADC with Correlated Multiple Sampling
Counter-Based ADC with Sawtooth Reference Signal
Time-Stretched SS-ADC
Circuit Elements
CDS Pre-Amplifier
Comparator
Ramp Generator
Column ADC Counters
Column ADC Power Breakdown
Future Outlook
Summary and Conclusions
References