Title :
Binary AC Josephson system and bias current circuits at NIM
Author :
Wang, Zengmin ; Gao, Yuan ; Li, Honghui
Author_Institution :
Nat. Inst. of Metrol., Beijing, China
Abstract :
This paper reports the progress of binary Josephson system for precise ac waveform synthesis in National Institute of Metrology, China (NIM). We designed a 32-channel bias source for dynamic voltage synthesis up to 1 kHz with a programmable Josephson junction array. The latest design of output drive current has a rise-time less than 50 ns on 100 ohm resistant. The 32-channel bias source is able to simultaneously provide bias current for two 1-volt SINIS junction arrays to synthesis two synchronous AC voltages.
Keywords :
frequency synthesizers; measurement standards; superconducting junction devices; waveform generators; AC waveform synthesis; NIM; National Institute of Metrology; SINIS junction array; bias current circuit; binary AC Josephson system; channel bias source; dynamic voltage synthesis; frequency 1 kHz; programmable Josephson junction array; resistance 100 ohm; synchronous AC voltage synthesis; Arrays; Josephson junctions; Junctions; Metrology; Shape; Switches; Voltage measurement; Bias source for ac waveform synthesis; Josephson voltage standard; voltage measurement;
Conference_Titel :
Precision Electromagnetic Measurements (CPEM), 2012 Conference on
Conference_Location :
Washington, DC
Print_ISBN :
978-1-4673-0439-9
DOI :
10.1109/CPEM.2012.6251112
