Dissertation
Photoresponse characteristics of the heterojunction bipolar transistor
Doctor of Philosophy (Ph.D.), Drexel University
Jun 1997
DOI:
https://doi.org/10.17918/00000648
Abstract
As the need for high-volume communication systems grows, especially in densely populated areas, so follows the demand for faster, less costly and more reliable network infrastructure. Fiber optics provides plenty bandwidth space that applications such as Local Area Networks (LANs), video and data distribution (eg. CATV, SONET), optically fed wireless systems and remoting of radar, could benefit from it. However the opto-electronic interconnects are major bottlenecks in such systems. The HBT operating as a three-terminal photodetector is potentially the best solution for optoelectronic integrated receivers. It is compatible with post-detection electronics requiring no matching circuits which reduces parasitics and is capable of providing simultaneous gain and amplification at high frequencies. It also requires small bias voltages which leads to lower power consumption, a very attractive characteristic for monolithic circuits. This work presents a comprehensive theoretical and experimental analysis of the HBT under illumination. The study covers static, dynamic and noise properties of these devices when working as photodetectors. Other types of transistors are also investigated such as the MESFET and the HEMT. Experimental results for the three types of transistors are compared to currently used photodiodes (PIN and MSMs). A new HBT photodetector, the optical-HBT, is proposed, implemented and characterized. The new design enhances the sensitivity of conventional HBTs without degrading bandwidth. The optical-HBT is fully compatible with existing electronics, has low power consumption and provides large gain and bandwidth simultaneously.
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Details
- Title
- Photoresponse characteristics of the heterojunction bipolar transistor
- Creators
- Luiz Eugenio Monteiro de Barros Jr.
- Contributors
- Peter R. Herczfeld (Advisor) - Drexel University, Electrical (and Computer) Engineering (1970-2026)
- Awarding Institution
- Drexel University
- Degree Awarded
- Doctor of Philosophy (Ph.D.)
- Publisher
- Drexel University; Philadelphia, Pennsylvania
- Number of pages
- xiv, 134 pages
- Resource Type
- Dissertation
- Language
- English
- Academic Unit
- College of Engineering (1970-2026); Electrical (and Computer) Engineering (1970-2026); Drexel University
- Other Identifier
- 991014970313104721