433MHz ASK接收机中低噪声放大器的设计  

Desigh of A Low-Noise Amplifier for 433 MHz Ask Receiver

作　　者：马和良[1] 陈元盈[1] 沈怿皓[1] 张润曦[1] 俞建国[1] 赖宗声[1] 

机构地区：[1]华东师范大学微电子电路与系统研究所,上海200062

出　　处：《电子器件》2008年第4期1180-1182,1186,共4页Chinese Journal of Electron Devices

基　　金：上海市科委资助(06SA14);江苏省专用集成电路设计重点实验室项目资助(JSICK0601)

摘　　要：采用UMC0.18μm标准CMOS工艺设计了一款433MHz ASK接收机中的LNA电路,采用差分带源极负反馈的共源共栅结构,实现单输入双输出,与混频器级联时,避免了使用外接平衡转换器。测试结果表明,该放大器的噪声系数为1.65dB,增益则达到了18.2dB,因此将很大程度上提高了整个接收机的噪声性能。同时输入输出匹配分别达到了-28dB和-24dB,IIP3也达到了-9.8dBm,在1.8V的电源电压下,功耗为6.5mW。芯片的尺寸为0.6mm×0.9mm。A 433 MHz low noise amplifier applied in ASK receiver has been designed in UMC 0. 18 μm standard CMOS process. The amplifier employs differential cascade structure with inductive source degeneration , implements single input and differential output,and avoids using balun when connect to mixer. This low noise amplifier provides a forward gain of 18. 2 dB with a noise figure of only 1.65 dB, so this LNA can largely improves performance of receiver. Input and output matching is - 28 dB and - 24 dB, input third-order intercept point is - 9. 8 dBm. The total power dissipation is 6. 5 mW from a 1.8 V supply. The LNA chip area is 0. 6 mm×0. 9 ram.

关 键 词：低噪声放大器 CMOS 噪声系数 增益 

分 类 号：TN722.3[电子电信—电路与系统]