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