| Presentation | 2005/2/2 Analysis of Superconducting Second-Order MASH Sigma-Delta Modulator Satoru HIRANO, Akira YOSHIDA, Hideo SUZUKI, Shinya HASUO, Keiichi TANABE, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We have investigated effects of frequency characteristics of a transformer in a superconducting second-order cascaded (MASH) lowpass sigma-delta modulator. The superconducting transformer connects two constituent single-loop modulators. Output of an integrating inductor of the first-stage modulator is magnetically fed to an integrating inductor of the second-stage modulator through the transformer. The quantization noise of the first-stage modulator is canceled with digital filters with proper transfer functions. Any irregular frequency characteristic of the transformer may cause degradation of overall performance of the MASH modulator. However, analytical calculation of the transfer function showed that the signal-to-noise ratio is not severely degraded if the transformer has a first-order lowpass filter characteristic with a moderate cutoff frequency when the oversampling ratio is sufficiently large. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Analog-to-Digital Converter / Sigma-Delta Modulator / MASH / Single-Flux-Quantum (SFQ) |
| Paper # | SCE2004-35 |
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| Conference Information | |
| Committee | SCE |
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| Conference Date | 2005/2/2(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
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| Paper Information | |
| Registration To | Superconductive Electronics (SCE) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Analysis of Superconducting Second-Order MASH Sigma-Delta Modulator |
| Sub Title (in English) | |
| Keyword(1) | Analog-to-Digital Converter |
| Keyword(2) | Sigma-Delta Modulator |
| Keyword(3) | MASH |
| Keyword(4) | Single-Flux-Quantum (SFQ) |
| 1st Author's Name | Satoru HIRANO |
| 1st Author's Affiliation | Superconductivity Research laboratory, International Superconductivity Technology Center() |
| 2nd Author's Name | Akira YOSHIDA |
| 2nd Author's Affiliation | Superconductivity Research laboratory, International Superconductivity Technology Center |
| 3rd Author's Name | Hideo SUZUKI |
| 3rd Author's Affiliation | Superconductivity Research laboratory, International Superconductivity Technology Center |
| 4th Author's Name | Shinya HASUO |
| 4th Author's Affiliation | Superconductivity Research laboratory, International Superconductivity Technology Center |
| 5th Author's Name | Keiichi TANABE |
| 5th Author's Affiliation | Superconductivity Research laboratory, International Superconductivity Technology Center |
| Date | 2005/2/2 |
| Paper # | SCE2004-35 |
| Volume (vol) | vol.104 |
| Number (no) | 654 |
| Page | pp.pp.- |
| #Pages | 4 |
| Date of Issue | |