RSFQ-based D/A converter for AC voltage standard

Author

Sasaki, H. ; Kiryu, S. ; Hirayama, F. ; Kikuchi, T. ; Maezawa, M. ; Shoji, A. ; Polonsky, S.V.

Author_Institution

Electrotech. Lab., Ibaraki, Japan

Volume

9

Issue

2

fYear

1999

fDate

6/1/1999 12:00:00 AM

Firstpage

3561

Lastpage

3564

Abstract

Digital to analog converters based on the Josephson effect are promising for voltage standards, because they produce voltage steps with ultimate precision and stability. In this paper, we describe a project to develop a Josephson D/A converter designed for synthesizing a sinusoidal waveform with metrological accuracy. The D/A converter is based on RSFQ (Rapid Single Flux Quantum) logic circuits, and consists of a frequency multiplier (FM), a pulse distributor (PD), and a number of voltage multipliers (VMs). Each VM circuit, corresponding to the n-th bit digital code, multiplies the number of SFQ pulses by a factor of 2/sup n/. By gating the input SFQ pulses from the FM to the VMs using the PD circuits, a programmable output voltage is obtained. Possible sources of uncertainties in the measurement of the rms value of the synthesized sine wave are discussed.

Keywords

Josephson effect; digital-analogue conversion; frequency multipliers; measurement standards; superconducting integrated circuits; voltage measurement; voltage multipliers; AC voltage standard; Josephson effect; RSFQ-based D/A converter; frequency multiplier; input SFQ pulses; programmable output voltage; pulse distributor; rapid single flux quantum logic circuits; sinusoidal waveform; synthesized sine wave; voltage multipliers; voltage steps; Circuit stability; Circuit synthesis; Digital-analog conversion; Frequency conversion; Josephson effect; Logic circuits; Pulse circuits; Virtual manufacturing; Voice mail; Voltage;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.783799

Filename

783799