| 一种应用于WiMAX接收机的CMOS可变增益放大器 |
| |
| 作者姓名： | 程心 杨海钢 高同强 尹韬 |
| |
| 作者单位： | 1. 中国科学院电子学研究所, 北京 100190;
2. 中国科学院研究生院, 北京 100049 |
| |
| 基金项目： | 国家高技术研究发展计划(863计划)(2012AA012301)和国家自然科学基金(61106025)资助 |
| |
| 摘 要： | 实现了一种应用于WiMAX无线接收机中频部分的单级可变增益放大器.由于采用电流平方技术,该结构能以较少的级联数,实现系统所需的固定增益变化范围,以达到降低总功耗的目的.该电路采用0.13 μm CMOS工艺进行流片,总面积为0.6×0.4 mm2.测试结果表明,当控制电压从0.5 V变化到1 V时,VGA的增益变化范围为-20～25 dB,其3 dB带宽大于15 MHz,IIP3为-21～5 dBm,在1.2 V电源电压下功耗为3.6 mW.
|
| 关 键 词： | WiMAX无线接收机 CMOS 可变增益放大器 电流平方 |
| 收稿时间： | 2012-03-09 |
| 修稿时间： | 2012-04-24 |
A CMOS variable gain amplifier applying to WiMAX receiver |
| |
| Authors: | CHENG Xin YANG Hai-Gang GAO Tong-Qiang YIN Tao |
| |
| Institution: | 1. Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China;
2. Graduate University, Chinese Academy of Sciences, Beijing 100049, China |
| |
| Abstract: | A single-stage variable gain amplifier for WiMAX receiver is implemented. By adopting current squaring technique, the VGA provides a large variable gain range compared to other single-stage VGAs. As a result, the proposed structure can achieve a given variable gain range with less stages and the whole power consumption is reduced. The chip is fabricated in 0.13 μm CMOS process, occupies 0.6×0.4 mm2, and consumes 3.6 mW power from 1.2 V supply. Experimental results show that a continuous gain range from -20 dB to 25 dB is achieved when the control voltage varies from 0.5 V to 1 V. Furthermore, the VGA provides a 3 dB bandwidth greater than 15 MHz and the measured IIP3 value is in the range -21 dBm to 5 dBm. |
| |
| Keywords: | WiMAX receivers CMOS variable gain amplifier current squaring |
|
| 点击此处可从《》浏览原始摘要信息 |
| 点击此处可从《》下载免费的PDF全文 |
|
