一种0.18 μm CMOS模拟滤波器的设计与实现  

Design and Implementation of a 0.18 μm CMOS Analog Filter

作　　者：胡靖[1] 周锋[1] 

机构地区：[1]复旦大学专用集成电路与系统国家重点实验室微纳电子科技创新平台,上海201203

出　　处：《微电子学》2015年第5期621-625,共5页Microelectronics

摘　　要：基于0.18μm CMOS工艺,实现了一种6阶有源RC模拟滤波器,截止频率可以配置为1.25 MHz/2.5 MHz/5 MHz/10 MHz,增益可以配置为0dB/6dB/12dB/18dB,能够应用于WiMAX/WLAN接收机。采用一种新型的自动频率校准电路,使滤波器的截止频率不受工艺变化的影响。测试结果表明,在1.8V电源电压下,消耗电流16mA,输入3阶交调为23.4dBm。正交两路模拟滤波器与频率校准电路所占面积为0.38mm2。A 6th-order active-RC analog baseband filter for WiMAX/WLAN receiver was fabricated in 0.18 μm CMOS process. The cutoff frequency could be tuned between 1.25 MHz/2.5 MHz/5 MHz/10 MHz, and the gain could range from 0 dB to 18 dB with 6 dB step. A new type of auto RC tuning circuit was adopted to allow the cutoff frequency to be accurate in spite of process variation. The test results showed that the circuit consumed 16 mA current at 1.8 V supply and the in-band IIP3 was 23.4 dBm at 0 dB gain. The analog filter and RC tuning circuit occupied a chip area of 0.38 mm^2 , including I ＆ Q channels.

关 键 词：模拟滤波器 前馈补偿 自动频率校准 直流失调消除 多模多频接收机 

分 类 号：TN432[电子电信—微电子学与固体电子学]