A 4-bits active inductor-based lattice 24.5–50 ps all-pass filter

Autor: Muhammed Mustafa Kizmaz, Norbert Herencsar, Oguzhan Cicekoglu
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Engineering Science and Technology, an International Journal, Vol 35, Iss , Pp 101263- (2022)
Druh dokumentu: article
ISSN: 2215-0986
DOI: 10.1016/j.jestch.2022.101263
Popis: In this paper, a lattice network-based second-order all-pass filter (APF) design is presented. Unlike previously published works, floating active inductors (FAIs) are used in the lattice topology. Inductance (L) and quality factor (Q) tunability of Q-enhanced FAIs are employed to ensure the designed APF is robust to process-voltage-temperature (PVT) variations and to make the filter’s group delay responses are constant for a wide frequency range. The operation of the proposed APF is verified by post-layout simulations using Cadence Design Suite in TSMC 65-nm CMOS technology. The operating frequency of the designed filter reaches 5 GHz with a delay range of 24.5-50 ps. The designed filter has a gain of -0.15 dB, which varies up to 1.47 dB in the operating frequency range. The group delay error is 114 fs, which is a 0.294% variation in the nominal case. The input-referred 1 dB compression point (P1dB) and the third-order interception point (IIP3) values are attained as -5.21 dBm and +9.19 dBm, respectively. At the nominal condition, the noise figure is achieved as 16.7 dB. The circuit occupies only 0.0189 μm2 while drawing 29 mA from a 1.5 V supply.
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