欢迎访问中国科学院大学学报,今天是

中国科学院大学学报 ›› 2013, Vol. 30 ›› Issue (2): 233-237.DOI: 10.7523/j.issn.1002-1175.2013.02.014

• 信息与电子科学 • 上一篇    下一篇

一种应用于WiMAX接收机的CMOS可变增益放大器

程心1,2, 杨海钢1, 高同强1, 尹韬1   

  1. 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
  • 收稿日期:2012-03-09 修回日期:2012-04-24 发布日期:2013-03-15
  • 通讯作者: 杨海钢
  • 基金资助:

    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

A CMOS variable gain amplifier applying to WiMAX receiver

CHENG Xin1,2, YANG Hai-Gang1, GAO Tong-Qiang1, YIN Tao1   

  1. 1. Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China;
    2. Graduate University, Chinese Academy of Sciences, Beijing 100049, China
  • Received:2012-03-09 Revised:2012-04-24 Published:2013-03-15

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

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.

Key words: WiMAX receivers, CMOS, variable gain amplifier, current squaring

中图分类号: