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A reconfigurable high ultimate rejection inductorless band‐pass filter by the use of N‐path passive mixers
Author(s) -
Hazrati Amin,
Jalali Ali,
Meghdadi Masoud
Publication year - 2021
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.2895
Subject(s) - center frequency , ripple , bandwidth (computing) , passband , band pass filter , filter (signal processing) , high pass filter , m derived filter , electronic engineering , prototype filter , low pass filter , computer science , electrical engineering , telecommunications , engineering , voltage
Summary In this paper, a band‐pass filter with a tunable bandwidth and the center frequency is introduced, which employs N‐path and N × M‐path passive mixer structures, for multiband multistandard wireless receivers. The center frequency of the proposed filter is tunable from 0.1 to 1 GHz, while its bandwidth is also adjustable from 6% to 34% of the center frequency at 100 MHz. The passband ripple is reduced by applying a Miller compensation technique, resulting in a worst‐case ripple of only 1.6 dB over the entire tuning range. An additional eight‐path filter is also utilized at the input of the circuit, which highly improves the out‐of‐band rejection of the filter as well as its out‐of‐band linearity. The noise figure and the input return loss are, respectively, better than 5 and 10 dB, and depending on the desired center frequency, the total power consumption of the proposed filter varies from 41 to 70 mW.