Effect of bandgap gradient in the base region of SiGe heterojunction bipolar transistors
β Scribed by David J. Roulston; Joel M. McGregor
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 151 KB
- Volume
- 35
- Category
- Article
- ISSN
- 0038-1101
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π SIMILAR VOLUMES
In this paper, the effects of Ge content and profile shape on the performance of a SiGe-based heterojunction bipolar transistor (HBT) are investigated. The common-emitter current gain, the early voltage, and the transit time of SiGe HBTs are calculated and computed for different Ge profiles as well
## Abstract By deriving new __Z__βparameter equations, accurate extraction is performed to determine all baseβcollector model parameters in a SiGe heterojunction bipolar transistor (HBT) equivalent circuit directly from measured __S__ parameters, without any test structure and geometric calculation