Design and optimization of LNA topologies with image rejection filters

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 lm CMOS technology by using Hspice.

Clustered-gravitational search algorithm and its application in parameter optimization of a low noise amplifier

“…Ref. [26] optimized two different LNA with a Pareto-based multi-objective genetic algorithm and Hspice.…”

“…is a combination of a heuristic search algorithm implemented in MATLAB and Hspice/Hspice RF as circuit simulator which can be linked automatically [22][23][24][25][26]. In Table 1, the reported researches in this field are summarized.…”

“…Heuristic search algorithm Simulator [15] GA, SA, LM 2 ADS [16] IGA a ADS [17] Layered encoding structure using combination of GA and PSO ADS [18] GA ADS [19] MOPSO-CD b and NSGA-II c ADS [20] PSO _ [21] Combination of GA and multi objective PSO (programmed in C++ software) ADS [14] GA, LM Hspice [22] Modified genetic algorithm and PSO Hspice RF [23] Genetic algorithm and Multi-Objective PSO Hspice RF [24] Multi objective genetic algorithm Hspice RF [25] NSGA-II Hspice RF [26] Pareto-based multi-objective genetic algorithm Hspice RF a Interactive genetic algorithm. b Multi-Objective Optimization algorithm PSO incorporating the mechanism of the crowding distance technique.…”

Design of a Low Noise Amplifire (LNA) with Image Rejection Filter

“…A good LNA has a lo w NF (like 1dB), a large enough gain (like 20d B) and should have large enough intermodulation and compression point (IP3 and P1d B). Further criteria are operating bandwidth, gain flatness, stability and input and output voltage standing wave ratio (VSW R) [1,2].…”