A New Linearization Technique for CMOS Low Noise Amplifiers with Balun Circuitry

A New Linearization Technique for CMOS Low Noise Amplifiers with Balun Circuitry

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Part of #A New Linearization Technique for CMOS Low Noise Amplifiers with Balun Circuitry# :

Publishing year : 2013

Conference : 21st Iranian Conference on Electrical Engineering

Number of pages : 4

Abstract: In this paper, a new linearization technique for differential low noise amplifiers (LNAs) is introduced. It removes the common-mode current at all frequencies. One of itsmain advantages is that it allows the receiver to have a single-ended input and differential output LNA which reduces the one-way order intermodulations. Also, this technique improves theLNA linearity in three ways. Firstly, it removes the commonmode current of all inter-modulations. Secondly, it reduces the one-way inter-modulations because of its balun circuitry operation. Finally, it improves the third input intercept point (IIP3) due to the possibility of different bias currents for input transistors. Simulation results using a 0.18m RF-CMOS technology with HSPICE-RF show that the IIP3 improves about 13 dBm at the expense of increasing the noise figure of about 0.7 dB in constant voltage gain and equal DC-power respected to conventional differential LNA