Design and optimization of LNA topologies with image rejection filters |
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| Authors: | Abbas Golmakani Khalil Mafinejad Abbas Kouzani |
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| Affiliation: | 1. Electrical Engineering Department, Sadjad Institute for Higher Education, Mashhad, Iran;2. Electrical Engineering Department, Ferdowsi University of Mashhad, Mashhad, Iran;3. Electrical Engineering Department, School of Engineering, Deakin University, Geelong, Victoria 3217, Australia |
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| Abstract: | An important problem in designing RFIC in CMOS technology is the parasitic elements of passive and active devices that complicate design calculations. This article presents three LNA topologies including cascode, folded cascade, and differential cascode and then introduces image rejection filters for low‐side and high‐side injection. Then, a new method for design and optimization of the circuits based on a Pareto‐based multiobjective genetic algorithm is proposed. A set of optimum device values and dimensions that best match design specifications are obtained. The optimization method is layout aware, parasitic aware, and simulation based. Circuit simulations are carried out based on TSMC 0.18 μm CMOS technology by using Hspice. © 2010 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2010. |
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| Keywords: | image rejection filter LNA multiobjective genetic algorithm optimization |
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