Research And Design Of CMOS Low-noise Amplifier And Mixer For Ultra Low-power RF Receiver

In recent years,with the development and wide application of wireless communication technology,the realization of multi-frequency and multi standard reconfigurable wireless transceiver is one of the great challenges in the field of high IC technology nowadays.In addition,the high performance,portability,low power consumption,low cost and solution requirements of communication equipment are also increasing.Broadband technology as the GHz bandwidth of the wireless communication technology,high speed,low power consumption,many standards,in many areas have a wide range of applications,is rapidly becoming a focus on academic and industry research and one of the hot spots.At the same time,with the development of deep submicron CMOS technology,the performance of the device has been greatly promoted,and RF systems integrated in a System-On-a-Chip is possible.However,Compared with the increasing demand of multi-standard and high performance,the development of the battery technology is relatively lagging.Low-noise amplifiers(LNA)and mixers(Mixer)as the core module of the RF receiver,the power consumption in the entire wireless communication system power consumption occupies a considerable proportion.Therefore,in order to meet the increasing demands of wireless communication equipment under the constraints of battery life,chip cooling and packaging cost,it is full of great significance to research and design of low power and high performance LNA and Mixer.This paper briefly introduces the research background and significance of the subject,analyzes the research actuality of ultra low-power LNA and Mixer at the domestic and international,and summarizes the advantages and disadvantages of several common low-power technology and corresponding circuit structure.Based on the above work,aiming at the trend of RFIC development and the development demand of wireless communication technology,a low-noise amplifier for front-end applications of wideband wireless communications RF receivers and a 2.4GHz ultra low-power down-Mixer for the ZigBee standard is designed in this paper.The main work and achievements are as follows:(1)A high linearity,low-power wideband low noise amplifier which can work 2.5?11GHz band is proposed.The LNA adopts folding CG topology and LC filter to match and extend the bandwidth.In addition to reducing to reduce the drain conductance nonlinearity,the posterior distortion linear technique is used in the folded-cascode structure.The post layout simulation shows the LNA achieves a maximum power gain of 12.8dB,a noise figure ranging between 3.2?4.OdB,input 3rd order intercept point maximum of 5.6dBm.The input return loss(S11)and output return loss(S22)are less than-11.0dB and-10.0dB,respectively,while the total power consumption is only 5.4mW under an low voltage of 1.0V.(2)An ultra low-power down-conversion mixer for 2.4GHz is presented.The Mixer is based on a double-balanced Gilbert-cell resistance-loaded topology where all MOS transistors of Mixer core are optimally biased in the subthreshold region by using folded cascade topology and forward-body-bias technique,greatly reducing Mixer operating voltage for ultra low-power consumption.The simulation results demonstrate that the proposed Mixer can provide 13.7 dB of conversion gain with a local oscillator power of-12.8dBm,a double sideband noise figure(NF)of 12.4dB,and input 3rd order intercept point of-7.8dBm,while the power consumption of this mixer is only 0.52mW under 1 V supply voltage.The proposed circuits are simulated in Chartered 0.18?m CMOS technology by Agilent ADS and Cadence software.Compared with the similar circuits which were reported in recent years,the proposed LNA and Mixer have certain advantages in power dissipation,gain and linearity.