Accurate Digital Synthesis of Sinewaves

Author

Lampasi, D.A. ; Moschitta, A. ; Carbone, P.

Author_Institution

Dept. of Electr. Eng., Univ. of Rome "La Sapienza"

fYear

2006

fDate

24-27 April 2006

Firstpage

786

Lastpage

790

Abstract

In this paper, the generation of spectrally pure sinusoidal signals is discussed. The proposed technique is implemented on a DSP and requires a digital-to-analog converter, an analog-to-digital converter and an analog filter. A modified DeltaSigma topology is adopted to efficiently estimate and compensate the digital-to-analog converter nonlinearities, while desensitizing the system to the non-idealities of the remaining circuital elements. It is shown that the proposed technique can improve the spurious-free dynamic range of the generated signal

Keywords

analogue-digital conversion; digital-analogue conversion; direct digital synthesis; nonlinear distortion; analog filter; analog-to-digital converter; digital-to-analog converter; nonlinear distortion; sigma-delta modulation; sinewave digital synthesis; sinusoidal signals; Analog-digital conversion; Circuit testing; Circuit topology; Digital filters; Digital signal processing; Dynamic range; Instrumentation and measurement; Linearity; Signal generators; Table lookup; Analog - to - digital conversion; digital - to - analog conversion; nonlinear distortion; sigma - delta modulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference, 2006. IMTC 2006. Proceedings of the IEEE

Conference_Location

Sorrento

ISSN

1091-5281

Print_ISBN

0-7803-9359-7

Electronic_ISBN

1091-5281

Type

conf

DOI

10.1109/IMTC.2006.328183

Filename

4124437