一个高电源抑制比的有源电感射频放大电路  

An RF Amplifier with High-PSRR Active Inductor

作　　者：李政[1] 刘萌萌[2] 张盛[1] 林孝康[1] 

机构地区：[1]清华大学深圳研究生院,广东深圳518055 [2]清华大学微纳电子系,北京100084

出　　处：《电子器件》2010年第4期420-423,共4页Chinese Journal of Electron Devices

基　　金：国家"863"项目<超宽带SoC芯片设计及组网试验>资助(2007AA01Z2B32)

摘　　要：提出了一种使用有源电感的电路实现方案,可用于宽带无线收发机射频放大电路的设计中。分析了有源电感的阻抗与各元件取值的关系,设计了中心频点调节电路和具有鲁棒性的偏置电路,保证工艺偏差和电源电压波动对有源电感的阻抗具有很弱的影响。在SMIC0.18-μm工艺下进行了电路设计和流片验证,测试结果表明,使用有源电感的射频放大电路,可以得到期望的射频信号,其中心频点的调节范围为0.5～2GHz,能够抵御高达0.8V的电源偏差。An active inductor implementation is presented,which can be implemented in the amplifiers within Ultra-wideband wireless transceivers.The impedance of the active inductor associated with other component of the circuit is analyzed.A centre-frequency tunable circuit and a supply-independent biasing circuit are designed,and it guarantees the active inductor’s impedance against sensing to the process variation and power supply variation.The circuit is designed and implemented in SMIC 0.18-μm CMOS process.The measurement results show that the RF amplifier with the presented active inductor can amplify input signal to desired modulated signal,the center frequency of the circuit can be tunable within 0.5～2 GHz,and its biasing circuit is robust even when the supply variation is as high as 0.8 V.

关 键 词：射频集成电路 射频放大器 有源电感 高电源抑制比 

分 类 号：TN722.14[电子电信—电路与系统]