26.6 A programmable receiver front-end achieving >17dBm IIP3 at <1.25×BW frequency offset

Recent work on highly selective reconfigurable radios has focused on techniques such as DT analog signal processing [1], N-path filtering [2], and mixer-first approaches [3,4]. Mixer-first receivers have been able to achieve excellent out-of-band (OOB) linearity even with noise cancellation [3], but only for far-out blockers due to only first-order baseband filtering. Higher-order baseband filters give sharper filtering, but are not as linear [4], while high-order active N-path filters have poor S11 [2]. DT approaches are also limited by the linearity of the front-end LNTA [1]. Hence, new approaches are needed to handle large blockers that are close to the signal band.

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[2]  Ahmad Mirzaei,et al.  A Blocker-Tolerant, Noise-Cancelling Receiver Suitable for Wideband Wireless Applications , 2012, IEEE Journal of Solid-State Circuits.

[3]  Milad Darvishi,et al.  A 0.1-to-1.2GHz tunable 6th-order N-path channel-select filter with 0.6dB passband ripple and +7dBm blocker tolerance , 2013, 2013 IEEE International Solid-State Circuits Conference Digest of Technical Papers.

[4]  Hossein Hashemi,et al.  19.3 Reconfigurable SDR receiver with enhanced front-end frequency selectivity suitable for intra-band and inter-band carrier aggregation , 2015, 2015 IEEE International Solid-State Circuits Conference - (ISSCC) Digest of Technical Papers.

[5]  Robert Bogdan Staszewski,et al.  3.8 A fully integrated highly reconfigurable discrete-time superheterodyne receiver , 2014, 2014 IEEE International Solid-State Circuits Conference Digest of Technical Papers (ISSCC).

[6]  Babak Daneshrad,et al.  Filtering by Aliasing , 2013, IEEE Transactions on Signal Processing.