4334

4098

كارشناسي ارشد

الكترونيك

اصفهان: دانشگاه صنعتي اصفهان، دانشكده برق و كامپيوتر

1387

ده،161،[II] ص: مصور، جدول، نمودار

ص.ع. به: فارسي و انگليسي

سعيد صدري، امير برجي

رسول دهقاني

30/11/87

مهندسي برق و كامپيوتر

ID4098

به فارسي و انگليسي: قابل رويت در نسخه ديجيتال

AbstractAll electronic circuits are nonlinear this is a fundamental truth of electronic engineering Thelinear assumption that underlies most modern circuit theory is in practice only anapproximation Some circuits such as small signal amplifiers are only very weaklynonlinear however and are used in systems as if they were linear Other circuits such asfrequency multipliers exploit the nonlinearities in their circuit elements these circuits wouldnot be possible if nonlinearities did not exist It is absolutely clear that designing nonlinearcircuits is more complicated than linear ones Nonlinear Designs require many issues such asnonlinear circuit elements models and simulation which both of them are going to bediscussed in this thesis In this thesis we first examine the effects of nonlinearity and How to analyze nonlinearcircuits Then modeling of semiconductor devices is discussed and the relations betweenthese models are extracted We study Harmonic Balance method and show how this analysisworks Volterra Series method is discussed in separate chapter as the main method in thisthesis and ways of obtaining nonlinear transfer function used in this method are extracted We use the semiconductor models to develop the nonlinearities in a bipolar transistorstructure We use the optimum Volterra series method to extract the terms related tointermodulation distortion according to the transistor nonlinearities considering temperatureas a parameter and separating the origins of these nonlinearities Although our results arebased on firm mathematical basis we used Matlab and compare numerical results of ourequations which were obtained by implementing a GUI program in Matlab with numericalresults of Microwave Office

سعيد صدري، امير برجي

رسول دهقاني