高性能动态分频器的研究与设计.docx

摘要
目前,毫米波应用需求迅猛增加,推动了高性能高频锁相环的开发与设计。分频器作为锁相环中工作频率最高的模块之一,已经成为锁相环中的重要模块。工作频率不断提高,GaAs HBT 器件由于具有相位噪声低、工作频率高等特点逐渐成为微波毫米波领域电路设计的首要选择。
本文首先阐述了动态分频器的基本理论,然后设计了一款基于 1μm GaAs HBT 工艺的 15-GHz 动态分频器。它基于 Gilber 混频单元,作为分频器核心,为了提高工作频率,采用有源负载技术来代替电阻负载。在片测试显示了分频范围从 9GHz 到 15GHz,最大工作频率在晶体管 fT/4 处,并且该动态分频器具有良好的输入灵敏度。该动态分频器核心电路的功耗为 ,供电电压-6v,版图面积为 ×。
关键字:动态分频器 GaAs HBT 有源负载
Abstract
Recently, the rapidly increasing demands for millimeter-wave applications have driven the development of high performance high frequency phase-locked loop (PLL). Frequency divider is important for operating at the highest frequency in the frequency phase-locked loop (PLL). Because of the improvement of the operating frequency, the GaAs HBT devices is ing the first choice of the field of microwave and millimeter wave circuit design with low phase noise and high operation frequency.
A 15-GHz dynamic divider implemented in 1μm GaAs HBT technology has been presented. To achieve higher operating frequency, active loads instead of resistor loads are incorporated into the dynamic divider. The consequence of on-wafer test shows that the operation frequency of the divider is from 9GHz to 15GHz. The maximum operating frequency of the divider is found to be fT/4 of the transistor, and also the divider has a good input sensitivity. The power consumption of the divider is with the supply voltage of -6V. The layout area of the dynamic divider is ×.
Key Words: Dynamic divider GaAs HBT active loads
目录
第一章绪论...................................................... 1
课题研究背景与意义....................................... 1
国内外发展现状........................................... 2
论文的主要工作........................................... 3
论文的组织结构............................................ 4
第二章分频器理论概述及吉尔伯特(Gilbert)混频单元 5
分频器的种类............................................. 5
静态分频器.......................................... 5
动态分频器...........................