Title: Quality factor optimisation of spiral inductor using firefly algorithm and its application in amplifier

Authors: Ram Kumar; Fazal A. Talukdar; Nilanjan Dey; Valentina E. Balas

Addresses: Department of ECE, National Institute of Technology, Silchar, EC-16, VLSI Lab ECE/CSE Building, Silchar, 788010, India ' Department of ECE, National Institute of Technology, Silchar, EC-21, ECE/CSE Building, Silchar, 788010, India ' Department of IT, Techno India College of Technology, West Bengal, India ' Faculty of Engineering, Aurel Vlaicu University of Arad, Romania

Abstract: This proposal details an optimised design of a CMOS spiral inductor for output matching circuit of low noise amplifier by employing nature inspired intelligence-based technique called firefly optimisation algorithm (FA). Optimisation of these parameters has been carried out by considering single objective function. Penalty factor method is considered for handling the constraints. Using FA technique, the inductor with a high quality factor of 5.87 is obtained at 5.5 GHz frequency in Matlab environment. A computer-aided design tool ASITIC is used for the validation. The output matching circuit of low noise amplifier is designed using pi model obtained from ASITIC. The designed LNA has a cascode structure with inductive source degeneration topology and is implemented in UMC 0.18 µm CMOS technology using CADENCE software. The designed LNA has a simulated value at 5.5 GHz frequency.

Keywords: spiral inductor; optimisation technique; particle swarm optimisation; firefly optimisation; low noise amplifier; quality factor; ASITIC.

DOI: 10.1504/IJAIP.2018.095469

International Journal of Advanced Intelligence Paradigms, 2018 Vol.11 No.3/4, pp.299 - 314

Received: 30 Nov 2015
Accepted: 24 Feb 2016
Published online: 08 Oct 2018 *

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