2025-06-09 産業技術総合研究所
開発した信号選択回路の概要と従来技術との比較
＜関連情報＞
- https://www.aist.go.jp/aist_j/press_release/pr2025/pr20250609/pr20250609.html
- https://www.vlsisymposium.org/wp-content/uploads/VLSI2025_Advanceprogram0422.pdf
0.25mW/qubit、5.7-7.5GHz、周波数多重Qubit制御用2段注入同期発振器を用いた極低温CMOSマイクロ波信号セレクタ
0.25 mW/qubit, 5.7-7.5 GHz Cryogenic CMOS Microwave Signal Selector using Dual-Stage Injection-Locked Oscillator for Frequency-Multiplexed Qubit Control
Hiroshi Fuketa, Ippei Akita, Tomohiro Ishikawa, Hanpei Koike, and Takahiro Mori
IEEE Symposium on VLSI Technology and Circuits 2025（2025年6月8日～12日、京都開催）
Cryogenic CMOS (cryo-CMOS) quantum bit (qubit) control circuits are expected to overcome the interconnect complexity problem in large-scale quantum computers. However, since each qubit has a unique frequency for control, many powerhungry oscillators are needed to generate the frequencies at the cryogenic temperature stage of a refrigerator. In this paper, to remove the oscillators from the refrigerator, we propose a cryo-CMOS signal selector consisting of two injection-locked oscillators that extract the specified frequency tone for qubit control from the multi-tone microwave signal. This can realize an efficient frequency-multiplexed qubit control system with 1/30 power consumption of the conventional systems.
