| Presentation | 1999/7/30 Ac bias readout schemes for high-T_c dc-SQUIDs Amane Hayashi, Hiroshi Oyama, Satoru Hirano, Shinya Kuriki, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Ac current-bias method is used in the readout system of dc-SQUIDs to suppress the low-frequency noise that originates in the fluctuation of parameters of two junctions in the SQUID. From the analysis of various schemes of the ac bias method, we propose a simple form which expresses the alternation of the operation variables, I.e., bias current, modulation flux, and bias flux. We considered the modification of the previous schemes in the context of this form, and found a possibility to detect exclusively the noise component due to the parameter fluctuation. In the modified ac bias scheme, the low-frequency noise of the parameter fluctuation can either be detected or suppressed by manipulating a single variable. We fabricated the electronics to verify this function, and confirmed the versatility of this method from the measurements of high-T_c SQUID. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | SQUID / ac bias / high-T_c SQUID / superconducting device / low-frequency noise |
| Paper # | SCE99-20 |
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| Conference Information | |
| Committee | SCE |
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| Conference Date | 1999/7/30(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
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| Paper Information | |
| Registration To | Superconductive Electronics (SCE) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Ac bias readout schemes for high-T_c dc-SQUIDs |
| Sub Title (in English) | |
| Keyword(1) | SQUID |
| Keyword(2) | ac bias |
| Keyword(3) | high-T_c SQUID |
| Keyword(4) | superconducting device |
| Keyword(5) | low-frequency noise |
| 1st Author's Name | Amane Hayashi |
| 1st Author's Affiliation | Research Institute for Electronic Science Hokkaido University() |
| 2nd Author's Name | Hiroshi Oyama |
| 2nd Author's Affiliation | Research Institute for Electronic Science Hokkaido University |
| 3rd Author's Name | Satoru Hirano |
| 3rd Author's Affiliation | Research Institute for Electronic Science Hokkaido University |
| 4th Author's Name | Shinya Kuriki |
| 4th Author's Affiliation | Research Institute for Electronic Science Hokkaido University |
| Date | 1999/7/30 |
| Paper # | SCE99-20 |
| Volume (vol) | vol.99 |
| Number (no) | 249 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |