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Resonant tunneling analog-to-digital converter
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | vanderWagt, J. P. A. Tang, H. Taddiken, A. Hellums, J. Seabaugh, A. C. Broekaert, T. P. E. Teng, J. |
| Copyright Year | 1995 |
| Description | As sampling rates continue to increase, current analog-to-digital converter (ADC) device technologies will soon reach a practical resolution limit. This limit will most profoundly effect satellite and military systems used, for example, for electronic countermeasures, electronic and signal intelligence, and phased array radar. New device and circuit concepts will be essential for continued progress. We describe a novel, folded architecture ADC which could enable a technological discontinuity in ADC performance. The converter technology is based on the integration of multiple resonant tunneling diodes (RTD) and hetero-junction transistors on an indium phosphide substrate. The RTD consists of a layered semiconductor hetero-structure AlAs/InGaAs/AlAs(2/4/2 nm) clad on either side by heavily doped InGaAs contact layers. Compact quantizers based around the RTD offer a reduction in the number of components and a reduction in the input capacitance Because the component count and capacitance scale with the number of bits N, rather than by 2 (exp n) as in the flash ADC, speed can be significantly increased, A 4-bit 2-GSps quantizer circuit is under development to evaluate the performance potential. Circuit designs for ADC conversion with a resolution of 6-bits at 25GSps may be enabled by the resonant tunneling approach. |
| File Size | 258166 |
| Page Count | 6 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19960054097 |
| Archival Resource Key | ark:/13960/t28964f4m |
| Language | English |
| Publisher Date | 1995-01-01 |
| Access Restriction | Open |
| Subject Keyword | Computer Operations And Hardware Phased Arrays Junction Transistors Indium Gallium Arsenides Aluminum Arsenides Semiconductors Materials Indium Phosphides Negative Resistance Devices Electronic Countermeasures Resonant Tunneling Quantum Electronics Analog To Digital Converters Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
