Title :
Josephson D/A converter with fundamental accuracy
Author :
Hamilton, C.A. ; Burroughs, C.J. ; Kautz, R.L.
Author_Institution :
Nat. Inst. of Stand. & Technol., Boulder, CO, USA
fDate :
4/1/1995 12:00:00 AM
Abstract :
A binary sequence of series arrays of shunted Josephson junctions is used to make a 14-b D/A converter. With 13 bias lines, any step number in the range -8192 to +8192 -1.2 V to +1.2 V can be selected in the time required to stabilize the bias current (a few microseconds). The circuit is a fast accurate dc reference, and it makes possible the digital synthesis of ac waveforms whose amplitudes derive directly from the internationally accepted definition of the volt
Keywords :
digital-analogue conversion; measurement standards; superconducting device testing; voltage measurement; -2 to 2 V; -8192 to 8192 V; Josephson D/A converter; ac waveforms; binary sequence; digital synthesis; internationally accepted definition; microwave distribution; series arrays; shunted Josephson junctions; volt; voltage standard; Binary sequences; Circuit synthesis; Frequency; Josephson junctions; Measurement standards; Microwave circuits; Microwave generation; NIST; Particle measurements; Voltage;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
