1. T. Ishibashi, O. Nakajima, J. Nagata, Y. Yamauchi, H. Ito: Ultra-high-speed AlGaAs/GaAs HBTs. IEDM 88, 826–829 (1988)
2. W.J. Ho, N.L. Wang, M.F. Chang, A. Sailer, J.A. Higgins: Self-alignment AlGaAs/GaAs HBT with extrapolated maximum oscillation frequency of 350 GHz. DRC’ 92, IVA-1 (1992)
3. A. Gruhle, H. Kibbel, U. Erben, E. Kasper: 91 GHz SiGe HBTs grown by MBE. Electr. Lett. 29, 415–416 (1993)
4. H. Schumacher, U. Erben, A. Gruhle: Noise characterisation of SiGe HBTs at microwave frequencies. Electr. Lett. 28, 1167–1168 (1992)
5. D.L. Harame, E.F. Crabbé, J.D. Cressler, J.H. Comfort: A high performance epitaxial SiGe-base ECL BICMOS technology. IEDM 92, 19–22 (1992)