Title :
Original approach for extracting the exact noise factor of differential microwave circuits using mixed-mode and noise-wave formalisms
Author :
Lintignat, J. ; Darfeuille, S. ; Sassi, Z. ; Barelaud, B. ; Billonnet, L. ; Jarry, B.
Author_Institution :
XLIM, Univ. de Limoges
Abstract :
In this paper, an analytical approach to study the noise figure of differential amplifiers is presented. First, the analytical expression of the noise figure for a four-port device is determined thanks to the use of a generalised method based on the noise-wave formalism. Then, the use of ideal baluns for the simulation of the noise figure is discussed in regards to the accuracy of the results. An analytical solution that can be implemented in a CAD software to get the correct and exact differential mode noise figure is proposed. Finally, in order to illustrate the purpose, the method is applied to the study of a differential three-branch channelized filter
Keywords :
baluns; circuit noise; differential amplifiers; microwave amplifiers; multiport networks; CAD software; differential amplifiers; differential microwave circuits; differential mode noise figure; differential three-branch channelized filter; exact noise factor; four-port device; ideal baluns; mixed-mode formalism; noise-wave formalism; Active noise reduction; Circuit noise; Circuit simulation; Impedance matching; Microwave circuits; Microwave theory and techniques; Noise figure; Noise generators; Radio frequency; Scattering parameters;
Conference_Titel :
Microwave Conference, 2006. 36th European
Conference_Location :
Manchester
Print_ISBN :
2-9600551-6-0
DOI :
10.1109/EUMC.2006.281424
