Sigma-delta A/D converter in HTS ramp edge technology
| Autor: | Hans Hilgenkamp, G.J. Gerritsma, A.H. Sonnenberg, I. Oomen, Horst Rogalla |
|---|---|
| Přispěvatelé: | Faculty of Science and Technology |
| Rok vydání: | 2001 |
| Předmět: |
Decimation
Materials science Comparator business.industry Amplifier IR-36054 METIS-200484 Condensed Matter Physics Delta-sigma modulation Noise (electronics) Electronic Optical and Magnetic Materials law.invention law Optoelectronics Electrical and Electronic Engineering Resistor business Ground plane Voltage |
| Zdroj: | IEEE transactions on applied superconductivity, 11(1), 200-204. IEEE |
| ISSN: | 1051-8223 |
| DOI: | 10.1109/77.919319 |
| Popis: | We have successfully fabricated and tested a high temperature superconducting sigma-delta A/D converter, The quantizer is a balanced comparator that has been characterized separately in two temperature regimes. The circuits have been fabricated with ramp edge junctions with a PrBaCuCaO-barrier on a buried ground plane. For the current to voltage conversion in the sigma-delta converter we fabricated a 50 mOhm resistor with an in-situ gold layer, The sigma-delta converter has been tested at an internal clock of up to 174 GHz. The signal-to-noise ratio has been measured at a relatively low frequency of 3.4 kHz and was at least 63 dB but most likely higher since the measurement was limited by the noise in the amplifiers, As a first attempt towards the development of a decimation filter we have fabricated and tested a toggle flip-flop. The toggle flip-flop has been tested successfully at 40 K up to a frequency of 33 GHz, which corresponds to 70% of the I/sub c/R/sub n/-product of a reference junction. |
| Databáze: | OpenAIRE |
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