Source: https://www.researchgate.net/profile/A-Coustou/publication/280790489_Conception_et_caracterisation_de_circuits_integres_en_technologie_BiCMOS_SiGe_pour_application_de_telecommunication_en_bande_X/links/56026c3408aed9851827d6e2/Conception-et-caracterisation-de-circuits-integres-en-technologie-BiCMOS-SiGe-pour-application-de-telecommunication-en-bande-X.pdf