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RF and microwave reconfigurable bandpass filter design using optimized active inductor circuit
Author(s) -
Ben Hammadi Aymen,
Haddad Fayrouz,
Mhiri Mongia,
Saad Sehmi,
Besbes Kamel
Publication year - 2018
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.21550
Subject(s) - band pass filter , inductor , center frequency , electronic engineering , active filter , high pass filter , materials science , insertion loss , bandwidth (computing) , voltage , electrical engineering , filter (signal processing) , optoelectronics , low pass filter , engineering , telecommunications
In this article, a design methodology of an active bandpass filter (BPF) using tunable active inductor (TAI) achieving wide frequency contiguous tuning range (FTR) is presented. The tunable BPF is realized with a differential TAI (DTAI) employing two‐reconfiguration mechanisms one for coarse‐tuning using a controllable current source while the fine‐tuning is performed through a variable feedback resistance. The center frequency tuning is performed through the variation of the DTAI control voltages. A cross‐coupled pair based negative resistance technique is also applied to compensate the resistive losses of equivalent RLC resonator. The filter performances are significantly improved using several optimization techniques such as voltage scaling and multigate finger techniques. The proposed BPF is simulated using 0.13 μm CMOS technology. The filter achieves an insertion loss (IL) of 26.62‐33.45 dB over the tuning range 1.16‐3.27 GHz with a relative bandwidth of 1.3%‐3.4%. The noise figure and input 1‐dB compression point at 1.84 GHz are 14.93 dB and 2.72 dBm, respectively. The designed RF filter consumes an average power of 5 mW at 1 V supply voltage.