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Junko AKAGI Mamoru KURATA Jiro YOSHIDA
The switching performance of the collector top AlGaAs/GaAs heterojunction bipolar transistor (HBT) has been investigated by simulating the operation of single-stage inverters, five-stage ring oscillators, and 1/4 frequency dividers including the comparison between the collector-top HBT and the standard emitter-top-HBT.
Gen-ichi HATAKOSHI Mamoru KURATA Etsuko IWASAWA Nawoto MOTEGI
A two-dimensional device simulator has been developed to analyze optical and electrical properties of laser diodes. The simulator can treat various kinds of laser diodes with arbitrary configurations and material systems. Analysis of transverse-mode stabilized InGaAlP laser diodes has made it clear that the optical mode behavior and the current distribution strongly depend on the ridge stripe configuration.