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タイトル: | Development of an ASIC preamplifier for electromagnetic sensor probes for monitoring space electromagnetic environments |
著者: | Ozaki, Mitsunori Yagitani, Satoshi Kojima, Hirotsugu https://orcid.org/0000-0002-4609-3500 (unconfirmed) Takahashi, Ken Koji, Hiroki Zushi, Takahiro Tokunaga, Yuya |
キーワード: | Spaceborne ASIC Loop antenna Temperature compensation High environmental robustness |
発行日: | 28-May-2016 |
出版者: | SpringerOpen |
誌名: | Earth, Planets and Space |
巻: | 68 |
論文番号: | 91 |
抄録: | [Background]Multipoint observations of plasma waves are essential for separating spatial and temporal variations of a plasma turbulence. Miniaturization and high environmental (temperature and radiation) robustness are key requirements for scientific instrument design toward a sensor network consisting of palm-sized probes. With increasing these demands, a preamplifier for the 3-axis loop antenna of an electromagnetic sensor probe has been developed by using application-specific integrated circuit (ASIC) technology with a 0.25-μm complementary metal-oxide-semiconductor process. [Findings]In the present study, a new temperature compensation method is proposed by using the open-loop gain of the ASIC preamplifier with a bandgap reference (BGR) circuit. Usually, the gain is characterized by the closed-loop gain, which is governed by the accuracy of the polysilicon resistances in a chip. The open-loop gain is characterized by the effective transconductance of the ASIC preamplifier, which often has a negative temperature dependence. The temperature dependence of the gain can be dramatically improved by using the temperature-compensated BGR circuit to cancel out the negative dependence of the transconductance. The temperature dependence of the gain was about −0.01−0.01 dB/∘∘C in the frequency range within the closed-loop bandwidth. On the other hand, the temperature dependence of the gain at 60 kHz operating with the open-loop gain was improved from −39×10[−3]−39×10−3 to −2.6×10[−3]−2.6×10[−3] dB/℃ by using the temperature-compensated BGR circuit. Moreover, the radiation robustness for the total ionizing dose (TID) level is evaluated by irradiation with gamma rays from cobalt-60. The ASIC preamplifier is not sensitive to TID effects when a thin gate oxide is used. The ASIC preamplifier showed a high radiation tolerance to at least a total ionizing dose level of 400 krad(Si). Finally, the effectiveness of the ASIC preamplifier is evaluated on the basis of a virtual sounding rocket experiment using theoretical calculations of LF standard electromagnetic waves. [Conclusions]Fundamental issues (miniaturization, low-noise performance, and high environmental robustness) are solved by the presented ASIC preamplifier. The success in developing the high robustness ASIC preamplifier leads to a future mission using a lot of palm-sized probes in space. |
著作権等: | © 2016 The Author(s). This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. |
URI: | http://hdl.handle.net/2433/215928 |
DOI(出版社版): | 10.1186/s40623-016-0470-9 |
出現コレクション: | 学術雑誌掲載論文等 |
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