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|Author(s):||Samuel P. Benz; Paul D. Dresselhaus; Charles J. Burroughs;|
|Title:||Multitone Waveform Synthesis with a Quantum Voltage Noise Source|
|Published:||November 09, 2010|
|Abstract:||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.|
|Citation:||IEEE Transactions on Applied Superconductivity|
|Pages:||pp. 681 - 686|
|Keywords:||Correlation, Digital-analog Conversion, Josephson Arrays, Johnson Noise, Quantization, Noise Measurement, Thermometry.|
|Research Areas:||Quantum Electrical Measurements, Johnson Noise Thermometry, Quantum Devices|
|PDF version:||Click here to retrieve PDF version of paper (1MB)|