A 4-Channel 20-to300 Mpixel/s Analog Front-End with Sampled Thermal Noise Below kT/C for Digital SLR Cameras ply nodes VDD and VSS caused by parasitic inductance, limiting crosstalk. Also, the floating current mirror formed by MN1 and MN2 allows the bias current to be easily optimized by the nonlinear bias generator described earlier.

📋 论文概要

本文提出了一种用于数字单反相机的4通道模拟前端(AFE)，支持20至300 Mpixel/s的像素速率。该设计实现了采样热噪声低于kT/C的理论极限，同时通道串扰超过-85dB，通道失配在±0.01%以内。

💡 主要创新点

• 实现了采样热噪声低于kT/C的新型参考缓冲器结构，突破了传统噪声限制。
• 通过优化布局和电路设计，达到超过-85dB的低通道串扰性能。
• 在低信号水平下通道失配控制在±0.01%以内，提高了图像均匀性。

🏷 关键词

📄 原文摘要

Analog Devices, Beijing, China With this new reference buffer, measured crosstalk exceeds -85dB. A fullscale step input is applied to the aggressor channel, and other channels are measured with inputs grounded. Channel mismatch, defined as the difference between each channel and the average of all 4 channels, is shown in Fig. 2.3.5. The mismatch is plotted from black level to 1/8 full-scale, because DSLR systems are much more sensitive to nonuniformity at low signal levels. The measured mismatch is roughly within ±0.01% of full-scale. We present a 4-channel analog front-end (AFE) designed specifically for multichannel sensors used in digital single-lens reflex (DSLR) cameras. Multichannel sensors have been adopted as a solution to the increasing requirements for higher throughput in imaging systems. Single-channel AFEs have been published [1-4]; however, there are drawbacks to using multiple

👥 作者与机构

Analog Devices, Wilmington, MA

Analog Devices, Tokyo, Japan