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Updated: Apr 21, 2026
05:39
Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
Published on: August 2, 2019
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Note: Increasing dynamic range of digital-to-analog converter using a superconducting quantum interference device.
1Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, AIST Central-3, 1-1, Umezono, Tsukuba, Ibaraki 305-8563, Japan.
The Review of Scientific Instruments
|November 3, 2014
Summary
This study presents an enhanced superconducting quantum interference device digital-to-analog converter (SQUID DAC). Modifications increased the dynamic range by interpolating within flux quantum intervals, demonstrating a high-performance SQUID DAC.
Area of Science:
- Quantum electronics
- Superconducting devices
Background:
- Superconducting Quantum Interference Devices (SQUIDs) exhibit periodic responses to magnetic flux.
- This periodicity is based on the flux quantum (Φo = h/2e).
Purpose of the Study:
- To improve the dynamic range of a SQUID-based digital-to-analog converter (DAC).
- To leverage quantum periodicity for enhanced DAC performance.
Main Methods:
- Developed a first-generation SQUID DAC with linear current output.
- Implemented interpolation within flux quantum intervals to increase dynamic range.
- Ensured interpolation linearity based on quantum periodicity.
Main Results:
- Achieved a significant increase in the dynamic range of the SQUID DAC.
- Demonstrated a SQUID DAC with a dynamic range of approximately 1.4 × 10^7.
- Confirmed the linearity of interpolation using quantum effects.
Conclusions:
- The modified SQUID DAC offers a substantially larger dynamic range.
- Quantum periodicity is effectively utilized for high-performance digital-to-analog conversion.
- This approach enables advanced applications requiring precise analog signal generation.
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