现代电子技术2026，Vol.49Issue(3)：163-168,6.DOI:10.16652/j.issn.1004-373x.2026.03.024
面向声学芯片的三阶反比例级联运放设计与仿真
Design and simulation of third-order inverse proportional cascade operational amplifier for acoustic chip
摘要
Abstract
As the core signal conditioning unit in surface acoustic wave(SAW)sensing systems,integrated operational amplifiers critically determine system performance by their gain and bandwidth characteristics.Targeting the limitations of conventional designs for 315 MHz delay-line SAW sensors,this work proposes a high-performance two-stage CMOS operational amplifier leveraging a third-order inverse proportional cascade structure to enhance gain and bandwidth.A multi-stage Miller compensation scheme is implemented to reshape the zero-pole configuration in the operational amplifier's transfer function,achieving enhanced phase margin and robust system stability.Experimental results show that the designed operational amplifier has a DC gain of 127.8 dB,a unity gain bandwidth of 906.7 MHz,and a power consumption of 20.2 μW,and its phase margin can reach 108.7°.The design achieves 37 dB gain at 315 MHz,meeting the oscillation loop requirements for SAW delay-line sensors below 400 MHz.This design not only provides key technical support for the integration and high performance of acoustic sensing system,but also can be extended to high-frequency and low-power scenarios such as wireless sensor network(WSN),biomedical detection and industrial Internet of Things(IoT)terminals,so it has significant engineering application value.关键词
CMOS/放大器/反比例级联/频率补偿/高增益/SAW传感系统Key words
CMOS/amplifier/inverse proportion cascade/frequency compensation/high gain/SAW sensing system分类
信息技术与安全科学引用本文复制引用
绳先闯,张涛,姜峰,鲁永志,赵新杰,李子豪..面向声学芯片的三阶反比例级联运放设计与仿真[J].现代电子技术,2026,49(3):163-168,6.基金项目
国家自然科学基金项目(52174151) （52174151）
国家自然科学基金项目(12474468) （12474468）
国家自然科学基金项目(12075189) （12075189）
陕西省联合基金重点项目(2021JML-05) （2021JML-05）
榆林市科技计划项目(2024-CXY-165) （2024-CXY-165）
