应用于ISM频段的高线性混频器的设计  

Design of High Linearity Mixer Used in ISM Band

作　　者：孙波[1] 

机构地区：[1]南京邮电大学电子科学与工程学院,江苏南京210023

出　　处：《电子科技》2017年第6期63-65,72,共4页Electronic Science and Technology

基　　金：江苏省自然科学基金青年基金(BK20130880);南京邮电大学大学生创新训练计划基金(SZD2016004)

摘　　要：设计了一种用于ISM频段的正交下变频混频器。在普通的吉尔伯特混频器的基础上,优化电路结构,采用共栅跨作为混频器的导级,同时混频器采用共跨导级正交结构,并利用动态电流注入技术减小噪声和提高混频器的增益。设计采用SMIC 0.18μm CMOS工艺,1.8 V电压供电,仅消耗电流4 m A。仿真结果显示,混频器增益为10.16 d B,1 d B压缩点大约为0 d Bm,噪声系数为10.38 d B,电路性能参数满足预期要求。A quadrature down conversion mixer for ISM frequency band is designed. On the basis of the general Gilbert mixer optimization circuit structure, the mixer adopts the total transconductanee orthogonal structure with the common gate cross as the guide of mixer and the dynamic current injection technology to reduce the noise and improve the mixer gain. The SMIC 0.18 CMOS M technology is employed, with 1.8 V voltage supply and a mere current consumption of 4 mA. Simulation shows a mixer gain of 10.16 dB, a 1 dB compression point about 0 dBm, and a noise coefficient of 10.38 dB.

关 键 词：共栅级跨导 正交混频器 动态电流注入 线性度 

分 类 号：TN773[电子电信—电路与系统]