Investigating the performance of cross-coupled CMOS LC-VCOs using genetic algorithm

Author

Ebrahimi, Emad ; Naseh, Sasan

Author_Institution

Dept. of Electr. Eng., Ferdowsi Univ. of Mashhad, Mashhad, Iran

fYear

2011

fDate

19-20 April 2011

Firstpage

1

Lastpage

4

Abstract

A fast simulation-based and parasitic-aware LC-VCO optimizer CAD tool, using Elitist Non-dominated Sorting Genetic Algorithm (NSGA-II) is presented. The proposed CAD tool optimizes the power consumption and phase noise of each conventional LC-VCO (e.g. NMOS-only, PMOS-only and complementary), simultaneously. In order to evaluate the fitness of the LC-VCO, the harmonic balance analysis is performed by HSPICE RF and then the optimizer core, implemented in MATLAB, manipulates the fitness and suggests some optimized designs. This CAD tool has the ability to optimize Figure of Merit of each configuration too. Design methodologies and comparison of performance of each structure, based on trade-off curves, are also presented and in a case study the cross-coupled LC-VCOs are optimized for 2.4-GHz central frequency (802.11 IEEE) in a commercial 0.18μm RF-CMOS technology.

Keywords

CAD; CMOS integrated circuits; SPICE; UHF integrated circuits; genetic algorithms; integrated circuit noise; phase noise; voltage-controlled oscillators; HSPICE RF; MATLAB; RF-CMOS technology; cross-coupled CMOS LC-VCO; elitist nondominated sorting genetic algorithm; frequency 2.4 GHz; harmonic balance analysis; parasitic-aware LC-VCO optimizer CAD tool; phase noise; power consumption; size 0.18 mum; Design automation; Genetic algorithms; Phase noise; Power demand; Radio frequency; Voltage-controlled oscillators; CAD Tool; LC voltage-controlled oscillator (LC-VCO); NSGA-II; Phase noise; genetic algorithm;

fLanguage

English

Publisher

ieee

Conference_Titel

Radioelektronika (RADIOELEKTRONIKA), 2011 21st International Conference

Conference_Location

Brno

Print_ISBN

978-1-61284-325-4

Type

conf

DOI

10.1109/RADIOELEK.2011.5936400

Filename

5936400