一种Q-频率特性增强的低噪声压控有源电感  

A Low Noise Voltage Controlled Active Inductor with Simultaneously Enhanced Q-Frequency Characteristics

作　　者：宋金达 张万荣 谢红云 金冬月 那伟聪 王雪 张辉 楚尚勋 曹健 SONG Jinda;ZHANG Wanrong;XIE Hongyun;JIN Dongyue;NA Weicong;WANG Xue;ZHANG Hui;CHU Shangxun;CAO Jian(College of Microelectronics,Faculty of Information Technology,Beijing University of Technology,Beijing 100124,P.R.China)

机构地区：[1]北京工业大学信息学部微电子学院,北京100124

出　　处：《微电子学》2024年第1期98-103,共6页Microelectronics

基　　金：国家自然科学基金项目(62271014);北京市自然科学基金项目(4232062);北京市教委科技计划一般项目(KM202110005029);中国博士后科学基金资助项目(2019M650404)。

摘　　要：提出了一种Q-频率特性增强的低噪声压控有源电感(VCAI),电路主要由双反馈回路、前馈支路及两个电流镜共四个模块构成。其中,双反馈回路一方面用于构成回转器以实现电感特性,另一方面用于产生负阻以提高Q值,并为其配置两个调控端以实现对Q值和电感值的调节;而两个电流镜也配置了两个外部调控端,用来改变电路直流偏置以进一步对Q值和电感值进行调节;前馈支路与回转器的正跨导器相连,以改善VCAI的噪声。最终,通过四个模块相互配合以及四个调控端的协同调控,使得VCAI的Q-频率特性得到增强,即不但在同一频率下Q峰值可以相对于电感值独立调节,而且在不同频率下Q峰值可以基本保持不变,还具有低的噪声。验证结果表明,在3GHz频率下,Q峰值可从135大范围调节到1132,而电感值仅从43.50n H到43.89n H范围内微弱变化;在2GHz、3.4GHz和5GHz不同频率下,Q峰值分别为682、659和635,变化率仅为6.8%;在1GHz下,VCAI的输入参考噪声电压为3.2nV/√Hz,相比于未加入前馈支路的9.2nV/√Hz降低了6nV/√Hz。A novel low noise voltage controlled active inductor(VCAI)with simultaneously enhanced characteristics of Q-frequency was proposed.It mainly consisted of four modules,which was a dual feedback loop,a feed-forward branch,and two current mirrors.Among them,the dual feedback loop was used not only to form a gyrator to achieve inductance characteristics,but also to generate negative resistance to improve the Q value,and furthermore was configured with two voltage control terminals to adjust the inductance L value and Q value.And the two current mirrors were configured with two external voltage control terminals to provide DC bias and to further adjust L value and Q value.The feed-forward branch was connected to the positive transconductor of the gyrator to reduce the noise.Finally,both the cooperation of four modules and the joint regulation of the four control terminals made the VCAI not only achieve independent adjustment of the Q peak values relative to the L values at the same frequency,but also maintain the Q peak values basically unchanged at different frequencies,and also have low noise.The verification results indicate that at 3 GHz,the Q peak values can be significantly tuned from 135 to 1132,while the L value only slightly changes from 43.50 nH to 43.89 nH.At 2 GHz,3.4 GHz,and 5 GHz,the Q peak values are 682,659,and 635,respectively,with a change rate of only 6.8%.At 1 GHz,the input reference noise voltage of VCAI is 3.2nV/√Hz,which is 6nV/√Hz lower than 9.2nV/√Hz for the AI without a feed-forward branch.

关 键 词：有源电感 独立调节 低噪声 

分 类 号：TN432[电子电信—微电子学与固体电子学]