DocumentCode :
1519372
Title :
AC and DC bipolar voltage source using quantized pulses
Author :
Benz, Samuel P. ; Hamilton, Clark A. ; Burroughs, Charles J., Jr. ; Harvey, Todd E.
Author_Institution :
Nat. Inst. of Stand. & Technol., Boulder, CO, USA
Volume :
48
Issue :
2
fYear :
1999
fDate :
4/1/1999 12:00:00 AM
Firstpage :
266
Lastpage :
269
Abstract :
We have developed an accurate bipolar voltage source for AC and DC metrology, based on the quantized pulses of Josephson junctions. The output voltage is a factor of 4-6 higher than the amplitude of previous unipolar waveforms; this is achieved by generating bipolar waveforms where arrays of junctions are driven with both a broadband two-level digital code and a sinusoidal frequency. We experimentally demonstrate two bipolar waveforms: a 5 kHz sine wave with ±18 mV peak amplitude and quantization noise power eight orders of magnitude below the power in the fundamental frequency, and a 3.5 kHz square wave with ±13 mV peak amplitude and even harmonics at -100 dB (carrier)
Keywords :
Josephson effect; calibration; measurement standards; pulse generators; quantisation (signal); superconducting arrays; superconducting junction devices; voltage measurement; 3.5 kHz; 5 kHz; AC metrology; DC metrology; Josephson junctions; bipolar voltage source; broadband two-level digital code; even harmonics; fundamental frequency; output voltage; quantization noise power; quantized pulses; sinusoidal frequency; superconducting junction arrays; AC generators; DC generators; Frequency; Josephson junctions; Metrology; Noise level; Power system harmonics; Pulse modulation; Quantization; Voltage;
fLanguage :
English
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9456
Type :
jour
DOI :
10.1109/19.769579
Filename :
769579
Link To Document :
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