Wr. Mckinnon et al., A COMPARISON OF THE DC AND RF CHARACTERISTICS OF SINGLE AND DOUBLE INP INGAAS HETEROJUNCTION BIPOLAR-TRANSISTORS/, Canadian journal of physics, 74, 1996, pp. 239-242
The dc and rf characteristics for InP/InGaAs heterojunction bipolar tr
ansistors having a single heterojunction design were measured and comp
ared with those for double heterojunction devices that employ a compos
ite collector. Although the composite-collector design improves the br
eakdown characteristics of our devices the rf performance was not as g
ood. This we partially attribute to the collector heterojunction, whic
h causes ''current blocking''.