Title :
Josephson D/A converter with fundamental accuracy [voltage standard]
Author :
Hamilton, C.A. ; Burroughs, C.J. ; Kautz, R.L.
Author_Institution :
Nat. Inst. of Stand. & Technol., Boulder, CO, USA
fDate :
June 27 1994-July 1 1994
Abstract :
A binary sequence of series arrays of shunted Josephson junctions is used to make a 14-bit D/A converter. With thirteen bias lines any step number in the range -8192 to +8192 (1.2 to -1.2 V) can be selected in the time required to stabilize the bias current (a few microseconds). The circuit makes possible the digital synthesis of very-accurate ac waveforms whose amplitude derives directly from the internationally accepted definition of the volt.<>
Keywords :
digital-analogue conversion; measurement standards; microwave measurement; superconducting junction devices; superconducting microwave devices; voltage measurement; 1.2 to -1.2 V; Josephson D/A converter; ac waveforms; bias current stabilisation; bias lines; binary sequence; digital synthesis; series arrays; shunted Josephson junctions; voltage standard; Binary sequences; Circuit synthesis; Frequency; Josephson junctions; Measurement standards; Microwave circuits; Microwave generation; NIST; Particle measurements; Voltage;
Conference_Titel :
Precision Electromagnetic Measurements, 1994. Digest., 1994 Conference on
Conference_Location :
Boulder, CO, USA
Print_ISBN :
0-7803-1984-2
DOI :
10.1109/CPEM.1994.333452
