摘要
对传统电流复用结构有源电感进行改进,提出了一款具有低功耗、低噪声和电感值相对于Q值可独立调节的有源电感(LPLN-AI)。主要由带有电压调谐端的增益增强型共源(CS)-共栅(CG)组合晶体管负跨导器(NT)、CS正跨导器(PT)、噪声抑制支路以及有源反馈放大器构成。其中,NT和PT以电流复用方式连接,既可实现电感特性、降低功耗,又可提高Q值;进一步地,在CG PT的栅端引入的噪声抑制支路减小了噪声;再者,有源反馈放大器嵌入到PT与NT之间的反馈路径中,进一步提高了Q值并补偿因电感值的调谐导致的Q值的变化。该LPLN-AI的上述电路拓扑结构,使得它不但在同一频率下电感值可以相对Q值独立调节,而且在不同工作频率下各个Q峰值可以保持基本不变,同时也具有较低的功耗与噪声。基于0.18μm CMOS工艺进行验证,结果表明:在2.75 GHz下,电感值可在258 nH到469 nH的范围内进行调谐,调谐率为83.7%,而Q值仅变化1.4%;在2.1 GHz、2.5 GHz和3.2 GHz的不同频率下,Q峰值分别高达327、329和328,而变化率仅为0.3%;在1 GHz和2.75 GHz下,噪声分别为2.99 nV∕√Hz和1.74 nV∕√Hz;直流功耗为0.96 mW。
To improve upon traditional active inductors based on current-reuse structures,a novel active inductor with low power consumption,low noise,and independently tunable inductance(L)and quality factor(Q)is proposed.The design primarily consists of a gain-enhanced common-source(CS)–common-gate(CG)composite negative transconductor(NT)with a voltage tuning terminal,a CG positive transconductor(PT),a noise suppression branch,and an active feedback amplifier.The NT and PT are connected in a current-reuse configuration,which enables inductive behavior while reducing power consumption and improving the Q factor.To further suppress noise,a noise suppression branch is introduced at the gate of the CG PT.Additionally,an active feedback amplifier with a voltage tuning terminal is added to the feedback path between the PT and NT to enhance the Q factor and compensate for variations in the Q peak caused by L tuning.This topology allows for independent tuning of the inductance value relative to the Q factor at a fixed frequency,while maintaining a nearly constant Q peak across different frequencies.The circuit also exhibits low power consumption and low noise.Fabricated using a 0.18-μm CMOS process,the inductance can be tuned from 258–469 nH,representing a tuning range of 83.7%,with only a 1.4%variation in Q at a high frequency of 2.75 GHz.At operating frequencies of 2.1,2.5,and 3.2 GHz,the Q peak values are 327,329,and 328,respectively,showing a variation of just 0.3%.The noise is 2.99 at 1 GHz and 1.74 at 2.75 GHz.The total power consumption is only 0.96 mW.
作者
张辉
张万荣
谢红云
金冬月
那伟聪
宋金达
王雪
楚尚勋
ZHANG Hui;ZHANG Wanrong;XIE Hongyun;JIN Dongyue;NA Weicong;SONG JindaWANG Xue;CHU Shangxun(College of Microelectronics,Faculty of Information Technology,Beijing University of Technology,Beijing 100124,P.R.China)
出处
《微电子学》
北大核心
2025年第4期600-605,共6页
Microelectronics
基金
国家自然科学基金资助项目(61774012,61574010,61901010)
北京市自然科学基金资助项目(4192014,4204092)
中国博士后科学基金资助项目(2019M650404)
北京市朝阳区博士后科研经费资助项目(2019ZZ-9)项目。
关键词
有源电感
独立调谐
低功耗
低噪声
active inductor
independent tuning
low power
low noise
