An (N+N2)-Mixer Architecture for a High-Image-Rejection Wireless Receiver with an N-Phase Active Complex Filter

Mamoru UGAJIN  Takuya SHINDO  Tsuneo TSUKAHARA  Takefumi HIRAGURI  

Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E100-A   No.4   pp.1008-1014
Publication Date: 2017/04/01
Online ISSN: 1745-1337
Type of Manuscript: PAPER
Category: Circuit Theory
Keyword: 
integrated circuit,  wireless receiver,  image rejection,  mismatch correction,  3-phase analog circuit,  complex filter,  

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Summary: 
A high-image-rejection wireless receiver with an N-phase active RC complex filter is proposed and analyzed. Signal analysis shows that the double-conversion receiver with (N+N2) mixers corrects the gain and phase mismatches of the adjacent image. Monte Carlo simulations evaluate the relation between image-rejection performances and the dispersions of device parameters for the double-conversion wireless receiver. The Monte Carlo simulations show that the image rejection ratio of the adjacent image depends almost only on R and C mismatches in the complex filter.