A blocker-tolerant wideband noise-cancelling receiver with a 2dB noise figure

David Murphy*, Amr Hafez, Ahmad Mirzaei, Mohyee Mikhemar, Hooman Darabi, Mau-Chung Chang, Asad Abidi

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

83 Scopus citations

Abstract

As narrowband off-chip RF filtering is not compatible with the concept of software-defined radio (SDR), an SDR receiver must be designed to tolerate large out-of-band blockers with minimal gain compression and noise figure degradation. A recent circuit [1] tackles this problem by dispensing with the LNA entirely. This mixer-first approach achieves impressive linearity, but at the expense of noise figure and, since such a receiver has no gain prior to down-conversion, the flicker noise corner can be unacceptably high. Other SDR attempts invariably use a noise-cancelling LNA at the front end, which provides wideband matching, however such approaches have either inadequate linearity [2] or display too large a noise for our purposes [3]. In this work, we propose a hybrid frequency-translational, noise-cancelling(FTNC) receiver that employs two separate down-conversion paths to enable noise cancelling with no voltage gain prior to base-band filtering. The resulting design has a sub-2dB noise figure and tolerates 0dBm blockers with no gain back-off, breaking the traditional noise-linearity trade-off common in all receivers.

Original languageEnglish
Title of host publication2012 IEEE International Solid-State Circuits Conference, ISSCC 2012 - Digest of Technical Papers
Pages74-75
Number of pages2
DOIs
StatePublished - 11 May 2012
Event59th International Solid-State Circuits Conference, ISSCC 2012 - San Francisco, CA, United States
Duration: 19 Feb 201223 Feb 2012

Publication series

NameDigest of Technical Papers - IEEE International Solid-State Circuits Conference
Volume55
ISSN (Print)0193-6530

Conference

Conference59th International Solid-State Circuits Conference, ISSCC 2012
CountryUnited States
CitySan Francisco, CA
Period19/02/1223/02/12

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    Murphy, D., Hafez, A., Mirzaei, A., Mikhemar, M., Darabi, H., Chang, M-C., & Abidi, A. (2012). A blocker-tolerant wideband noise-cancelling receiver with a 2dB noise figure. In 2012 IEEE International Solid-State Circuits Conference, ISSCC 2012 - Digest of Technical Papers (pp. 74-75). [6176935] (Digest of Technical Papers - IEEE International Solid-State Circuits Conference; Vol. 55). https://doi.org/10.1109/ISSCC.2012.6176935