Journal of South China University of Technology (Natural Science Edition) ›› 2016, Vol. 44 ›› Issue (1): 37-43.doi: 10.3969/j.issn.1000-565X.2016.01.006

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

Design of Anti-Interference High-Linearity RF Front-End

CHEN Zhi-jian CAI Min   

  1. School of Electronic and Information Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2015-04-24 Revised:2015-07-30 Online:2016-01-25 Published:2015-12-09
  • Contact: 陈志坚( 1979-) ，男，博士生，主要从事集成电路设计研究． E-mail:391452@qq.com
  • About author:陈志坚( 1979-) ，男，博士生，主要从事集成电路设计研究．
  • Supported by:
    Supported by the Economic and Information Commission Major Program of Guangdong Province( 2011912004) ， the Guangdong Industry-University-Research Collaboration Project( 2011A090200106) and the Hi-Tech Zone Development and Guide Special Project of Guangdong Province( 2011B010700065)

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Abstract: In order to suppress interferences and improve the linearity of circuits,a SAW-less RF front-end system is designed by using a 0.13 μm RF CMOS process.This design adopts a novel variable-gain low-noise transconductance amplifier with a loop eliminating interferences,a 25% duty-cycle current-commutating passive mixer and a transimpedance amplifier,so as to achieve an RF front-end system of anti-interference,low noise and high linearity.Tapeout and test results show that the designed front-end system accomplishes the goals of 20 dB out-band interference rejection,44.98 dB gain and 2.03 dB noise figure at 2.4GHz with a － 7 dBm 3rd input intermodulation point ( IIP3) and a + 72 dBm 2nd input intermodulation point ( IIP2) being obtained,which means that the designed system needs no surface acoustic wave filter and is of anti-interference characteristic.In addition,the designed system has a power supply voltage of 1.2 V and a power consumption of 36mA.

Key words: surface acoustic wave filters, RF front-end, transconductance amplifier, passive mixer, transimpedance amplifier

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