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一种便捷的用于片上电源网的高阻射频隔离器
2020年电子技术应用第7期
张志文,王策兴,粟 涛
中山大学 电子与信息工程学院,广东 广州510006
摘要: 集成电路和系统级封装中的隔离器位于电源网与有源器件之间,保证有源电路的直流偏置和射频隔离,且其拓扑形状与电源网结构适配为宜。针对传统的隔离器形状复杂、设计繁琐、难以嵌入电源网的问题,提出一种楔形隔离器。其拓扑结构形似集成电路条状电源网络,由外臂、底轨和内轨组成,根据阻带频率决定内轨的位置。当外臂张角一定时,无论内轨位置如何,都能使隔离器在阻带内表现出很高的输入阻抗。使用三维电磁场仿真对设计思想进行验证,并使用印刷电路工艺设计原型隔离器进行实测。仿真和测试结果证明了隔离器的有效性。它的结构简单,非常适合通过修改芯片电源网局部形状来实现。其设计过程便捷,即使数字工程师也能轻松操作。
中圖分類號: TN713
文獻標識碼: A
DOI:10.16157/j.issn.0258-7998.200030
中文引用格式: 張志文,王策興,粟濤. 一種便捷的用于片上電源網(wǎng)的高阻射頻隔離器[J].電子技術(shù)應(yīng)用,2020,46(7):10-14.
英文引用格式: Zhang Zhiwen,Wang Cexing,Su Tao. An agile high input impedance RF choke for on-chip power distribution network[J]. Application of Electronic Technique,2020,46(7):10-14.
An agile high input impedance RF choke for on-chip power distribution network
Zhang Zhiwen,Wang Cexing,Su Tao
School of Electronics and Information Technology,Sun Yat-sen University,Guangzhou 510006,China
Abstract: Chokes in integrated circuits and system in packages are used between power grids and active devices. It can maintain DC biasing and RF isolation of active circuit, and its topological structure should match power network structure. In this paper, a wedge-shaped choke is proposed to solve the problem of complicated shape, complicated design procedure and difficulty in embedding power network of conventional RF choke. Its topological structure is similar to strip power grid. The choke consists of an outer arm and an internal rail whose location can be determined by stop-band frequency. The choke exhibits high input impedance in the stop-band once the flare angle of outer arms is at an appropriate value. The design idea is validated by HFSS electromagnetic field simulation. The prototype of the choke is fabricated using printed circuit technology. Both simulation and measurement prove the effectiveness of the choke. Its structure and design process are simple, and it can be easily embedded in IC chip. Even digital engineers can easily implement it.
Key words : band-stop filter;high impedance;integrated circuits;agile design

0 引言

    許多有源毫米波電路都需要對輸入端和輸出端進行直流偏置,且偏置電源與端口之間必須進行交流隔離,因此需要一種具有極低直流阻抗的射頻隔離器。同時,要避免隔離器的負載效應(yīng)對射頻信號傳輸產(chǎn)生影響,故要求隔離器具備高輸入阻抗[1]

    國內(nèi)外對隔離器進行了諸多研究,但大都集中在光的單向傳輸隔離[2]、微波頻率的正向?qū)?sup>[3-4]等領(lǐng)域,關(guān)于通直隔交型的隔離器也僅局限于集總元件的搭建,不適合嵌入集成電路電源網(wǎng)絡(luò)[5]。已經(jīng)大量研究報導(dǎo)的濾波器[6-12]具有通直隔交的極佳特性,但其阻帶內(nèi)端口輸入阻抗的問題沒有得到充分考慮。此外,這些濾波器的結(jié)構(gòu)復(fù)雜,與芯片電源網(wǎng)條狀結(jié)構(gòu)相去甚遠,故不適合嵌入芯片電源網(wǎng);且其設(shè)計過程精巧,數(shù)字背景的芯片設(shè)計師不易掌握。針對上述問題,本文提出了一種楔形隔離器,其三角形拓撲結(jié)構(gòu)形似條狀電源網(wǎng)結(jié)構(gòu),方便集成于片上電源網(wǎng),其設(shè)計方便,具有低直流阻抗、高交流輸入阻抗。




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作者信息:

張志文,王策興,粟  濤

(中山大學(xué) 電子與信息工程學(xué)院,廣東 廣州510006)

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