Monolithically integrated optical differential amplifiers for applications in smart pixel arrays
| Autor: | D. Leipold, Peter Seitz, Bruce D. Patterson, U. Kehrli, J.E. Epler, K. Thelen |
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| Rok vydání: | 1996 |
| Předmět: |
Materials science
business.industry Amplifier Transistor Differential amplifier Condensed Matter Physics Atomic and Molecular Physics and Optics Photodiode law.invention Gallium arsenide chemistry.chemical_compound chemistry law MOSFET Optoelectronics Electrical and Electronic Engineering business Electronic circuit Diode |
| Zdroj: | IEEE Journal of Quantum Electronics. 32:770-777 |
| ISSN: | 0018-9197 |
| DOI: | 10.1109/3.492999 |
| Popis: | The design, fabrication, and characterization of monolithically integrated single- and dual-stage cascadable optical differential amplifiers (ODAs) are presented. The circuits are realized with photodiodes (PDs), metal-semiconductor field-effect transistors (MESFETs) and light-emitting diodes (LEDs) in the GaAs-AlGaAs system. They are fabricated with a process which uses trench technology for the separation of the devices. The single-stage switching energy of 2.5 pJ is reduced to 0.4 pJ by the addition of a second stage, thereby increasing the bandwidth from 2 to 12 MHz., The output power is 30 /spl mu/W, and the measured contrast ratio is approximately 1000. Switching is possible over an input power range of more than 5 decades, with a lower limit of 15 pW. We measure an optical open-loop gain of 2/spl middot/10/sup 6/ and a power dissipation of 15-20 mW. |
| Databáze: | OpenAIRE |
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