| Presentation | 2022-08-08 A cryogenic digital-to-analog converter for high-fidelity control of large-scale qubit arrays Ryozo Takahashi, Takuji Miki, Makoto Nagata, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This work presents a cryogenic digital-to-analog converter (DAC) for controlling a qubits in a large-scale quantum computer. The development of a qubit control chip which can be placed on a 4-8 K plate in a dilution refrigerator is one of the most important challenges for realizing large-scale quantum computers. This work proposes a small and low-power DAC for a bias voltage generator, one of the major components of a control chip. The capacitor arrays composing a charge-redistribution DAC are miniaturized by utilizing the cryogenic characteristics of low noise and leakage. Furthermore, capacitor mismatches due to their small size are automatically corrected by a newly proposed calibration technique with a small area-overhead. The prototype DAC was evaluated at 8 K temperature, and it achieved a very small area of 0.008 mm^2 and low power consumption of 5.8 uW, while a non-linearity error within +/-2 LSB. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | cryogenic / digital-to-analog converter / mismatch calibration / quantum computer |
| Paper # | SDM2022-42,ICD2022-10 |
| Date of Issue | 2022-08-01 (SDM, ICD) |
| Conference Information | |
| Committee | ICD / SDM / ITE-IST |
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| Conference Date | 2022/8/8(3days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Analog, Mixed Analog and Digital, RF, and Sensor Interface, Low Voltage/Low Power Techniques, Novel Devices/Circuits, and the Applications |
| Chair | Masafumi Takahashi(Kioxia) / Shunichiro Ohmi(Tokyo Inst. of Tech.) / 秋田 純一(金沢大) |
| Vice Chair | Makoto Ikeda(Univ. of Tokyo) / Tatsuya Usami(ASM Japan) / 池辺 将之(北大) / 廣瀬 裕(パナソニック) |
| Secretary | Makoto Ikeda(Shinshu Univ.) / Tatsuya Usami(TSMC) / 池辺 将之(Tohoku Univ.) / 廣瀬 裕(Panasonic) |
| Assistant | Jun Shiomi(Osaka Univ.) / Yoshiaki Yoshihara(キオクシア) / Takeshi Kuboki(Sony Semiconductor Solutions) / Takuji Hosoi(Kwansei Gakuin Univ.) / Takuya Futase(SanDisk) / 山下 雄一郎(TSMC) / 大倉 俊介(立命館大) / 竹本 良章(メムスコア) |
| Paper Information | |
| Registration To | Technical Committee on Integrated Circuits and Devices / Technical Committee on Silicon Device and Materials / Technical Group on Information Sensing Technologies |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A cryogenic digital-to-analog converter for high-fidelity control of large-scale qubit arrays |
| Sub Title (in English) | |
| Keyword(1) | cryogenic |
| Keyword(2) | digital-to-analog converter |
| Keyword(3) | mismatch calibration |
| Keyword(4) | quantum computer |
| 1st Author's Name | Ryozo Takahashi |
| 1st Author's Affiliation | Kobe University(Kobe Univ.) |
| 2nd Author's Name | Takuji Miki |
| 2nd Author's Affiliation | Kobe University(Kobe Univ.) |
| 3rd Author's Name | Makoto Nagata |
| 3rd Author's Affiliation | Kobe University(Kobe Univ.) |
| Date | 2022-08-08 |
| Paper # | SDM2022-42,ICD2022-10 |
| Volume (vol) | vol.122 |
| Number (no) | SDM-148,ICD-149 |
| Page | pp.pp.37-40(SDM), pp.37-40(ICD), |
| #Pages | 4 |
| Date of Issue | 2022-08-01 (SDM, ICD) |