A wideband CMOS low noise amplifier employing noise and IM2 distortion cancellation for a digital TV tuner

FREE-DOWNLOAD D Im, I Nam, HT Kim… – Solid-State Circuits, research …, 2009

Abstract—A wideband CMOS low noise amplifier (LNA) with single-ended input and output employing
noise and IM2 distor- tion cancellation for a digital terrestrial and cable TV tuner is
presented. By adopting a noise canceling structure combining a common source amplifier

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  • engpaper.com

    A CMOS Wide-Band Low-Noise Amplifier With Balun-Based Noise-Canceling Technique
    A differential high linearity low-noise amplifier
    (LNA) based on a capacitor-cross-coupled topology is presented
    in this paper. An off-chip balun is used for providing DC-bias
    and canceling the channel thermal noise of the transconductance
    MOS transistors. The LNA uses NMOS load and provides an
    extra signal feed-forward and noise-canceling path. Analysis
    shows that the noise contribution of the transconductance MOST
    is only γ/20 and the noise figure (NF) of the proposed LNA is
    1 + 0.2γ. The chip is implemented in a 0.18-μm MMRF CMOS
    process. Measured results show that in 50M-860MHz frequency
    range, the LNA achieved 15 dB gain, 2.5 dB NF, 8.3 dBm IIP3
    and consumes only 4 mA current from a 1.8-V supply.