A multiphase direct-digital-synthesis sinewave generator for high-accuracy impedance comparison

Author

Callegaro, Luca ; Galzerano, Gianluca ; Svelto, Cesare

Author_Institution

Ist. Elettrotecnico Nazionale Galileo Ferraris, Torino, Italy

Volume

50

Issue

4

fYear

2001

fDate

8/1/2001 12:00:00 AM

Firstpage

926

Lastpage

929

Abstract

In this paper we report on the realization and characterization of a multiphase sinewave generator based on the direct-digital-synthesis technique using the latest Analog Devices direct-digital-synthesizer model AD9853. The generator is intended for use in high-accuracy impedance intercomparison setups; thus, particular attention is paid to the stability and distortion of the sine wave output signal. The sinewave frequency can be tuned in the range from 16 Hz to 16 kHz with a resolution <10 μHz and with a relative frequency short-term stability of 10^-7, whereas the sinewave long-term amplitude stability is better than 10^-6 at full amplitude output. Signal amplitude, frequency, and phase are monitored and set by means of a personal computer

Keywords

direct digital synthesis; electric immittance measurement; measurement standards; waveform generators; 16 Hz to 16 kHz; Analog Devices model AD9853; high-accuracy impedance comparison; impedance intercomparison; multiphase direct-digital-synthesis sinewave generator; relative frequency short-term stability; sine wave output signal; Character generation; Electrical resistance measurement; Frequency; Impedance measurement; Measurement standards; Particle measurements; Phase measurement; Stability; Standards development; Voltage;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.948301

Filename

948301