Low Complexity Architecture of N-Path Mixers for Low Power Application

The complexity of harmonic rejection N-path mixer based receivers is studied in this paper. A solution to improve harmonic rejection without increasing the complexity is presented and compared with conventional LNA-first receivers. This solution is based on π-delayed driving signals that enable a N-...

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Published in2019 17th IEEE International New Circuits and Systems Conference (NEWCAS) pp. 1 - 4
Main Authors Al Shakoush, A., Lauga-Larroze, E., Subias, S., Taris, T., Podevin, F., Bourdel, S.
Format Conference Proceeding Journal Article
LanguageEnglish
Published IEEE 01.06.2019
Association for the Scientific Study of Consciousness
Subjects
blocker
Cognitive science
harmonic rejection
mixer-first
N-Patch mixer
receiver
software-defined radio
N-Patch mixer mixer-first receiver softwaredefined radio harmonic rejection blocker
blocker
receiver
mixer-first
harmonic rejection
softwaredefined radio
N-Patch mixer
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Summary:The complexity of harmonic rejection N-path mixer based receivers is studied in this paper. A solution to improve harmonic rejection without increasing the complexity is presented and compared with conventional LNA-first receivers. This solution is based on π-delayed driving signals that enable a N-path mixer to present the same harmonic rejection than its 2N-path counterparts while reducing by 2 the frequency of operation and showing a reduced number of differential gain stages and switches. A 5-path mixer is thus proposed. It allows rejecting up to the 8 th harmonic with only 3 differential gain stages whereas only the 6 th harmonic would be rejected with conventional topologies having the same number of amplifier stages.
ISSN:1039-723X
1039-723X
DOI:10.1109/NEWCAS44328.2019.8961234