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Breaking the Performance Tradeoffs in N-Path Mixer-First Receivers Using a Second-Order Baseband Noise-Canceling TIA | IEEE Journals & Magazine | IEEE Xplore
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Breaking the Performance Tradeoffs in N-Path Mixer-First Receivers Using a Second-Order Baseband Noise-Canceling TIA


Abstract:

Input-match, noise figure (NF), in-band (IB) third-order input-referred intercept point (IIP3), out-of-band (OB) IIP3, and power consumption are five crucial performance ...Show More

Abstract:

Input-match, noise figure (NF), in-band (IB) third-order input-referred intercept point (IIP3), out-of-band (OB) IIP3, and power consumption are five crucial performance metrics of a radio frequency (RF) receiver. In a typical passive mixer-first receiver, these five performance metrics are tightly coupled with each other. In this article, a second-order baseband noise-canceling (NC) scheme is proposed to break the performance tradeoffs in an N-path mixer-first receiver. Analytical expressions for input impedance, NF, IB-IIP3, and OB-IIP3 of the proposed NC receiver are derived and verified. A prototype mixer-first receiver is implemented in CMOS 180 nm technology and tested in the laboratory. In measurements, the receiver achieves an NF less than 4 dB and IB-IIP3 of +14.5 dBm over a frequency range of 0.2–1.2 GHz. The measured OB-IIP3 is +25 dBm at a frequency offset of 2.2 times the bandwidth while consuming a static power of 20 mW.
Published in: IEEE Journal of Solid-State Circuits ( Volume: 55, Issue: 11, November 2020)
Page(s): 3009 - 3023
Date of Publication: 13 July 2020

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