一种低功耗宽摆幅的绝对值电路设计  

Design of Low-power and Wide-swing Absolute Value Circuit

作　　者：祖文俊 钟啸宇 虞致国 顾晓峰 ZU Wenjun;ZHONG Xiaoyu;YU Zhiguo;GU Xiaofeng(Engineering Research Center of IoT Technology Applications(Ministry of Education),Department of Electronic Engineering,Jiangnan University,Wuxi,Jiangsu 214122,P.R.China)

机构地区：[1]江南大学电子工程系物联网技术应用教育部工程研究中心,江苏无锡214122

出　　处：《微电子学》2024年第3期404-410,共7页Microelectronics

基　　金：长三角科技创新共同体联合攻关项目(2022CSJGG0402);江苏省重点研发计划产业前瞻与关键核心技术项目(BE2023019-3)。

摘　　要：提出了一种低功耗宽摆幅的绝对值电路。该电路通过比较器输出结果判断输入电压的正负,正值利用负反馈进行保持,负值利用电压-电流转换电路和电流镜转换为正值。与传统利用二极管的设计相比,该电路避免了线性度差、功耗高的问题。基于55 nm CMOS工艺进行了电路设计,仿真结果表明,在电源电压为-1.2 V和1.2 V的条件下,电压输入摆幅高达-400~400 mV,绝对值电路误差在0.5%以内,功耗为450μW,版图面积为4 800μm^(2)。A low power and wide swing absolute value circuit is proposed.The circuit determines the polarity of an input voltage according to the output result of a comparator.Positive values are preserved via negative feedback,whereas negative values are converted into positive values using a voltage-current conversion circuit and current mirror.Compared with traditional designs using diodes,this circuit mitigates issues such as poor linearity and high power consumption.The circuit is designed using a 55-nm CMOS process.Simulation results indicate that under supply voltages of-1.2 and 1.2 V,the voltage input swing can reach a wide range from-400 to 400 mV and an error of less than 0.5%,with power consumption of 450 μW over a layout area of 4 800 μm^(2).

关 键 词：绝对值电路 低功耗 宽摆幅 低面积开销 

分 类 号：TN40[电子电信—微电子学与固体电子学] TN432