@article{9b8ba9a8bb5b4ce38fb70e9ddcad9fd1,
title = "Simple, Analytical Expressions of an Effect of Local Signal Imperfections on Four-Phase Passive-Mixer-Based Bandpass Filter",
abstract = "This paper describes simple, analytical expressions for a quadrature passive-mixer-based RF bandpass filter. We have analyzed the passive mixer clocked by the trapezoidal-shaped local (LO) signals with different rise and fall times. Obtained results show that the partially overlapping LO signals and/or large capacitance of low-noise amplifier load cause charge reduction of each baseband branch capacitance. This results in the filter characteristics degradation. To achieve good filter characteristics, short rise and fall time of the LO signal and/or appropriate mixer RF-node biasing is effective. Our analysis results agreed well with the data obtained from the Advanced Design System simulator.",
keywords = "Analytical expression, CMOS, Fourier transform, LO signal imperfection, Q-factor, bandpass filter, fall-time, four-phase passive-mixer, rise-time, stopband attenuation",
author = "Kazuki Kishida and Tadashi Maeda",
note = "Funding Information: Manuscript received March 28, 2018; revised June 19, 2018; accepted July 11, 2018. Date of publication August 20, 2018; date of current version December 6, 2018. This work was supported in part by the VLSI Design and Education Center (VDEC), The University of Tokyo, in collaboration with Agilent Technologies Japan, Ltd. and in part by the SIT Research Center for Green Innovation. This paper was recommended by Associate Editor M. Onabajo. (Corresponding author: Kazuki Kishida.) K. Kishida is with the Graduate School of Engineering and Science, Shibaura Institute of Technology, Tokyo 135-8548, Japan. T. Maeda is with the Graduate School of Engineering and Science, Shibaura ANALYSIS OF BPF CHARACTERISTICS Institute of Technology, Tokyo 135-8548, Japan, and also with the SIT INAPASSIVEMIXER Publisher Copyright: {\textcopyright} 2018 IEEE.",
year = "2019",
month = jan,
doi = "10.1109/TCSI.2018.2857624",
language = "English",
volume = "66",
pages = "147--160",
journal = "IEEE Transactions on Circuits and Systems I: Regular Papers",
issn = "1549-8328",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "1",
}