Multitone Waveform Synthesis With a Quantum Voltage Noise Source

被引：25
作者：
Benz, Samuel P. [1 ]
Dresselhaus, Paul D. [1 ]
Burroughs, Charles J. [1 ]
机构：
[1] Natl Inst Stand & Technol, Boulder, CO 80305 USA
来源：
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2011年 / 21卷 / 03期
关键词：
Correlation; digital-analog conversion; Josephson arrays; Johnson noise; noise measurement; quantization; thermometry;
D O I：
10.1109/TASC.2010.2083616
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We have developed a quantum voltage noise source (QVNS) based on pulse-driven Josephson arrays and optimized its waveform synthesis for use with Johnson noise thermometry (JNT). The QVNS synthesizes multitone waveforms with equal amplitude harmonic tones and random relative phases in order to characterize the amplitude-frequency response of the analog and digital electronics of the JNT system. We describe the QVNS circuit design and operation, including the lumped-array Josephson-junction circuit and the unipolar bias technique. In particular, we describe the primary design considerations that determine the voltage accuracy of the harmonic tones.
引用
收藏
页码：681 / 686
页数：6
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