Ultrapure sinewave generation by combining Josephson systems

Luis Palafox, Ralf Behr, Oliver Kieler, Franz Ahlers

Abstract

The combination of systems exploiting binary-divided and pulse-driven Josephson arrays allows the generation of sinewaves with amplitudes of up to 10 V and very low harmonic distortion (-122 dBc). We present results from the combination of a 1 V binary divided Josephson array employed as a multilevel digital to analogue converter and a pulse driven array that is programmed to cancel the harmonic content present in the stepwise approximated output of the binary array. The synthesized waveform can be locked to a timing reference for ultimate frequency stability. The quantum nature of the Josephson synthesizers guarantees the stability of the amplitude. The unprecedented amplitudes available with this spectral purity open new possibilities for testing of electronic modules and analogue to digital converters.

Keywords

Josepshon voltage standard, Analog digital converter, Testing and characterization of electronic circuits

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DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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