This paper presents a multiobjective analog/RF circuit sizing tool using an improved brain storm optimization (IMBSO) algorithm with the purpose of analyzing the tradeoffs between competing performance speciﬁcations of analog/RF circuit block. A number of improvements are incorporated into IMBSO algorithm at different steps. At ﬁrst, the clustering step of IMBSO algorithm is augmented with k-means++ seeding technique to select the initial cluster centroids while clustering using k-means clustering technique. As a second improvement, the proposed IMBSO algorithm makes use of random probabilistic decision-making of river formation dynamics scheme to select optimal cluster centroids during population generation step. As a third improvement, an adaptive mutation operator is incorporated inside the IMBSO algorithm to generate new population. Finally, two separate constraint handling techniques are employed to handle both boundary and functional constraints during analog/RF circuit optimization. The performance of the proposed IMBSO algorithm is demonstrated in ﬁnding optimal Pareto fronts among different performance speciﬁcations of a two-stage operational ampliﬁer circuit, a folded cascode ampliﬁer circuit and a low noise ampliﬁer circuit. Keywords Brain storm optimization · Analog/RF circuit optimization · Multi-objective optimization · River formation dynamics 1 Introduction Analyzing multiple objective functions (two design speci- ﬁcations) simultaneously requires complete exploration
Memetic Computing – Springer Journals
Published: May 31, 2018
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