A high IIP2 SAW-less superheterodyne receiver with multistage harmonic rejection
I Madadi (Qualinx, TU Delft - Electronics)
M Tohidian (TU Delft - Electronics, Qualinx)
Koen Cornelissens (M4S/Hisilicon)
Patrick Vandenameele (M4S/Hisilicon)
Robert B. Staszewski (University College Dublin)
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Abstract
In this paper, we propose and demonstrate the first fully integrated surface acoustic wave (SAW)-less superheterodyne receiver (RX) for 4G cellular applications. The RX operates in discrete-time domain and introduces various innovations to simultaneously improve noise and linearity performance while reducing power consumption: a highly linear wideband noise-canceling low-noise transconductance amplifier (LNTA), a blocker-resilient octal charge-sharing bandpass filter, and a cascaded harmonic rejection circuitry. The RX is implemented in 28-nm CMOS and it does not require any calibration. It features NF of 2.1-2.6 dB, an immeasurably high input second intercept point for closely-spaced or modulated interferers, and input third intercept point of 8-14 dBm, while drawing only 22-40 mW in various operating modes.