Title :
Accurate Digital Synthesis of Sinewaves
Author :
Lampasi, D.A. ; Moschitta, A. ; Carbone, P.
Author_Institution :
Dept. of Electr. Eng., Univ. of Rome "La Sapienza"
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;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 2006. IMTC 2006. Proceedings of the IEEE
Conference_Location :
Sorrento
Print_ISBN :
0-7803-9359-7
Electronic_ISBN :
1091-5281
DOI :
10.1109/IMTC.2006.328183
