A N-Path Receiver With Harmonic Response Suppression
Abstract
A downconversion receiver employing a switch-based N-path filter with reduced harmonic response around the third- and fifth- LO harmonics is presented. The N-path filter is placed in a frequency-translation feedback loop that is effective at the 3rd and the 5th LO harmonics to mitigate harmonic downconversion. A pulse-width-modulated LO (PWM-LO) clocking scheme is used in the feedback upconverter to reduce the noise injected around the LO harmonic at the input of N-path downconverter. The compression resulting from blockers around the 3rd and the 5th LO harmonics is also suppressed as a result of reduced harmonic response. Compensation of peak frequency shift of the N-path response due to parasitic input capacitance is also described.
Keywords
Cite
@article{arxiv.2107.01535,
title = {A N-Path Receiver With Harmonic Response Suppression},
author = {Venkata Suresh Rayudu and Ki Yong Kim and Ranjit Gharpurey},
journal= {arXiv preprint arXiv:2107.01535},
year = {2021}
}
Comments
5 pages, 8 figures