Increasing the frequency resolution of NCO-systems using a circuit based on a digital adder

Author

Ertl, R. ; Baier, J.

Author_Institution

Dept. of Electr. Eng., Tech. Univ. Wien, Austria

Volume

43

Issue

3

fYear

1996

fDate

3/1/1996 12:00:00 AM

Firstpage

266

Lastpage

269

Abstract

A digital low cost solution for increasing the frequency resolution of Direct Digital Synthesizers (DDS) containing Numerically Controlled Oscillators (NCO´s) is presented. The additional hardware can be used for all off-the-shelf NCO´s offering a carry input of the internal phase-accumulator. Its simplicity makes it suitable for many applications, especially where cost-efficient solutions are required. An example of an actual implementation of a signal-generator using this technique is presented and described

Keywords

adders; circuit tuning; direct digital synthesis; numerical control; oscillators; NCO-systems; carry input; cost-efficient solutions; digital adder; digital low cost solution; direct digital synthesizers; fine tuning circuit; frequency resolution; internal phase-accumulator; numerically controlled oscillators; signal-generator; Adders; Circuits; Clocks; Costs; Cutoff frequency; Equations; Frequency synthesizers; Low pass filters; Sampling methods; Signal resolution;

fLanguage

English

Journal_Title

Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1057-7130

Type

jour

DOI

10.1109/82.486472

Filename

486472