A Self-Adaptively Bandwidth-Adjustable Receiver Analog Front-End for Sensitive Photoacoustic Signal Detection

IF 2.2 Q3 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE

IEEE Solid-State Circuits Letters Pub Date : 2024-09-09 DOI:10.1109/LSSC.2024.3456374

Wei Fu;Wenshuo Zhu;Jiawei Liu;Luyao Zhu;Yi Li;Fei Gao;Yuan Gao

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引用次数: 0

Abstract

This letter presents a receiver analog front-end (AFE) circuit specifically for photoacoustic (PA) imaging system. Due to the uncertain nature of the PA signal’s spectrum, this design is proposed featuring multiple bandwidth options that can self-adaptively adjust the loop bandwidth based on the received PA signals in different frequency bands, greatly reducing out-of-band noise and interference. The circuit includes a low-noise amplifier (LNA) and a low-pass filter (LPF), offering four bandwidth options. Frequency detection and bandwidth selection logic are implemented to achieve self-adaptive bandwidth adjustment. The chip is fabricated in a 0.18-

$\mu $

m CMOS process with variable gain settings and 4 bandwidth options, achieving 39.5 dB maximum gain, 4 MHz maximum bandwidth, minimum

$3.47~\mu $

Vrms input-referred noise and maximum 12.2 mW power consumption, specifically suitable for PA signal detection.

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用于灵敏光声信号检测的自适应带宽可调接收器模拟前端

本文介绍了一种专门用于光声（PA）成像系统的接收器模拟前端（AFE）电路。由于 PA 信号频谱的不确定性，该设计具有多个带宽选项，可根据接收到的不同频段 PA 信号自适应调节环路带宽，从而大大降低带外噪声和干扰。电路包括一个低噪声放大器（LNA）和一个低通滤波器（LPF），提供四个带宽选项。通过频率检测和带宽选择逻辑来实现自适应带宽调整。该芯片采用 0.18- $\mu $ m CMOS 工艺制造，具有可变增益设置和 4 个带宽选项，实现了 39.5 dB 最大增益、4 MHz 最大带宽、最小 3.47~\mu $ Vrms 输入参考噪声和最大 12.2 mW 功耗，特别适合 PA 信号检测。

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

IEEE Solid-State Circuits Letters Engineering-Electrical and Electronic Engineering

CiteScore

4.30

自引率

3.70%

发文量