| Title |
1.8 mW, 4-8 GHz Bandwidth Mixer with Bleeding Transistors for Superconducting Qubit Read-out |
| Authors |
(Seunghyeon Baek) ; (Hyeonsik Ahn) ; (Muhammad Fakhri Mauludin) ; (Youngwoo Ji) ; (Jusung Kim) |
| DOI |
https://doi.org/10.5573/JSTS.2025.25.3.206 |
| Keywords |
Cross-coupled technique; dynamic current bleeding; low-power; quantum computing |
| Abstract |
This paper presents a low-power down-conversion mixer with an ultra-low power consumption of 1.8 mW and a wide bandwidth covering 4-8 GHz, designed for superconducting qubit read-out systems. The proposed mixer utilizes bleeding transistors to enhance the linearity and reduce the noise, critical factors for accurate qubit state measurement. By optimizing the RF and LO paths, the proposed design achieves improved conversion gain and reduced local oscillator leakage, thereby preserving the integrity of qubit information. Simulation results demonstrate that the presented mixer achieves a noise figure of 8.6 dB, a 1 dB gain compression at -11.7 dBm, a gain of 16.8 dB, albeit with a ultra-low power consumption of 1.8 mW, making it suitable for integration into large-scale quantum computing architectures. The proposed mixer was designed using the TSMC 65 nm process, with a supply voltage of 1.2 V, showing competitive performance compared to state-of-the-art designs in the field. |