Title :
Noise modelling in LNAs with negative feedback transformer matching
Author :
Tzschoppe, Christoph ; Richter, Alexander ; Jorges, Udo ; Wagner, Jens ; Ellinger, Frank
Author_Institution :
Dept. of Circuit Design & Network Theor., Tech. Univ. Dresden, Dresden, Germany
Abstract :
In this paper a detailed investigation of LNA noise using negative transformer feedback matching is performed. It is shown, that the transformer matching technique (TMT) is well suited for full on-chip integration of the necessary inductors and it also enables a low noise figure while conjugate complex matching is performed. To prove the assumption analytical calculations using a simplified VBIC-transistor model for noise behavior and for the calculation of the input impedance are performed and verified with simulations of transistors in IHP 130 nm-SiGe-BiCMOS. The models used are verified by measurements of a fabricated LNA.
Keywords :
BiCMOS analogue integrated circuits; feedback amplifiers; inductors; low noise amplifiers; transformers; IHP BiCMOS; LNA; SiGe; TMT; assumption analytical calculations; conjugate complex matching; full on-chip integration; inductors; input impedance; low noise amplifier; low noise figure; negative feedback transformer matching; noise modelling; simplified VBIC-transistor model; size 130 nm; transformer matching technique; Impedance; Inductors; Integrated circuit modeling; Mathematical model; Noise; Transfer functions; Transistors; Impedance matching; Integrated circuit noise; Low-noise amplifiers; Noise figure; Transformers;
Conference_Titel :
Microwave Conference (GeMiC), 2015 German
Conference_Location :
Nuremberg
DOI :
10.1109/GEMIC.2015.7107773
