A 10-Bit Two-Step Single Slope ADC With Inter-Stage Calibration for CMOS Image Sensors

IF 0.7 4区工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Electronics Letters Pub Date : 2025-04-30 DOI:10.1049/ell2.70253

Tianyu Liu, Rensheng Shen, Xinshuang Yu, Yang Qu, Kang Cao, Yuchun Chang

引用次数: 0

Abstract

This letter introduces a novel 10-bit two-step single slope analogue-to-digital converter architecture featuring high 3-bit and low 7-bit quantization stages. It reuses the programmable gain amplifier as the multiplying digital-to-analogue converter (MDAC) for residue amplification, enhancing resource efficiency. A on-demand column-level MDAC calibration mechanism without redundant bits corrects coarse quantization errors and ensures accurate residue amplification. This work achieves a maximum sampling rate of up to 1 M SPS and an effective number of bits of 9.5 bits, with an signal-to-noise ratio of 58 dB, and DNL and INL within 1.5 LSB, making it suitable for high-performance CMOS image sensors.

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用于CMOS图像传感器的10位两步单斜率级间校准ADC

本文介绍了一种新颖的10位两步单斜率模数转换器架构，具有高3位和低7位量化级。利用可编程增益放大器作为倍增式数模转换器（MDAC）进行残差放大，提高了资源利用率。无冗余位的按需柱级MDAC校准机制可纠正粗量化误差并确保准确的残留放大。本工作最大采样率高达1m SPS，有效位数为9.5位，信噪比为58 dB， DNL和INL在1.5 LSB以内，适用于高性能CMOS图像传感器。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Electronics Letters 工程技术-工程：电子与电气

CiteScore

2.70

自引率

0.00%

发文量

268

审稿时长

3.6 months

期刊介绍： Electronics Letters is an internationally renowned peer-reviewed rapid-communication journal that publishes short original research papers every two weeks. Its broad and interdisciplinary scope covers the latest developments in all electronic engineering related fields including communication, biomedical, optical and device technologies. Electronics Letters also provides further insight into some of the latest developments through special features and interviews. Scope As a journal at the forefront of its field, Electronics Letters publishes papers covering all themes of electronic and electrical engineering. The major themes of the journal are listed below. Antennas and Propagation Biomedical and Bioinspired Technologies, Signal Processing and Applications Control Engineering Electromagnetism: Theory, Materials and Devices Electronic Circuits and Systems Image, Video and Vision Processing and Applications Information, Computing and Communications Instrumentation and Measurement Microwave Technology Optical Communications Photonics and Opto-Electronics Power Electronics, Energy and Sustainability Radar, Sonar and Navigation Semiconductor Technology Signal Processing MIMO