A Pixel-Pitch-Matched Ultrasound Receiver for 3D Photoacoustic Imaging with Integrated Delta-Sigma Beamformer in 28nm UTBB FDSOI

📋 论文概要

本文提出了一种像素间距匹配的超声接收器，用于3D光声成像，通过集成Delta-Sigma波束形成器在CMOS衬底上实现密集信号处理，解决了传统2D换能器阵列高通道数导致的电缆接口瓶颈问题。该设计实现了片上数据压缩，减少了数据输出量。

💡 主要创新点

• 提出像素间距匹配的接收器架构，实现与2D换能器阵列的紧密集成，支持高密度信号调理。
• 集成Delta-Sigma波束形成器，在模拟域完成波束形成和数据压缩，降低片外数据传输带宽。
• 采用28nm UT工艺，在低功耗下实现高集成度，适用于便携式3D光声成像系统。

🏷 关键词

📄 原文摘要

in medical ultrasound rely on 3D volumetric imaging, calling for dense 2D transducer arrays with thousands of elements. Due to this high channel count, the traditional per-element cable interface used for 1D arrays is no longer viable. To address this issue, recent work has proven the viability of flip-chip bonding [1] or direct transducer integration [2]. This shifts the burden to a CMOS substrate, which must provide dense signal conditioning and processing before the massively parallel image data can be pushed off chip. A common approach for data reduction is to employ subarray beamforming (BF), which applies delay and sum operations within a group of pixels. To implement such functionality within the tight pixel pitch, prior works have implemented the

👥 作者与机构

Man-Chia Chen1, Aldo Peña Perez1, Sri-Rajasekhar Kothapalli1,

Philippe Cathelin2, Andreia Cathelin2, Sanjiv Sam Gambhir1, Boris Murmann1 Stanford University, Stanford, CA STMicroelectronics, Crolles, France 1 2 A variety of emerging applications