A 2.4dB NF +4.1dBm IIP3 Differential Dual-Feedforward-Based Noise-Cancelling LNTA With Complementary NMOS and PMOS Configuration.


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This paper proposes a dual-feedforward-based noise-cancelling (NC) technique, where the noise contribution of the auxiliary amplifier is proportional to its transconductance, allowing for simultaneous current and noise reduction. This technique is used to implement a low-noise transconductance amplifier (LNTA) tailored for current-mode receiver. Moreover, the complementary NMOS and PMOS configuration is employed to improve the third-order linearity performance by attenuating the second-order distortion. Fabricated in TSMC 28nm CMOS, the differential inductorless LNTA achieves an $S_{21}$ of 10. 2dB with a 3-dB bandwidth of 0.25 to 3. 7GHz, a NF of 2. 4dB at 1. 4GHz and an IIP3 of 4.1dBm at IGHz. It draws 6. 6mA from a 1. 2V supply, occupying a compact active area of 0.021mm 2 .
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Key words
low-noise transconductance amplifier,CMOS low-noise amplifier,noise-cancelling,feedforward,inductorless,complementary configuration
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