Digital architecture for a piecewise-linear arbitrary-waveform generator

In this paper a digital architecture for generating piecewise-linear arbitrary waveforms is presented. The proposed design is able to generate a piecewise-linear periodic signal by only using a minimum number of input data (breakpoints). The generator circuit implements a hybrid scheme which takes a...

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Bibliographic Details
Published in:Sadhana (Bangalore) 2016-08, Vol.41 (8), p.847-853
Main Authors: Jimenez-Fernandez, Victor M, Vazquez-Leal, Hector, Luna-Lozano, Pablo S, Vazquez-Beltran, J L, Garcia-Santiago, G, Valdes-Ortega, E
Format: Article
Language:English
Subjects:
Computer architecture
Engineering
Lookup tables
Waveform generators
Waveforms
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Summary:In this paper a digital architecture for generating piecewise-linear arbitrary waveforms is presented. The proposed design is able to generate a piecewise-linear periodic signal by only using a minimum number of input data (breakpoints). The generator circuit implements a hybrid scheme which takes advantage of two methods: the purely piecewise-linear interpolation and the lookup-table structure. From the piecewise-linear method exploits the characteristic of a reduced memory requirement as well as the capability of automatically construct a waveform by repetitive (iterative) function evaluations. From lookup-table makes use of the simplicity in hardware implementation and the higher processing speed. In order to verify the performance of this proposal, three piecewise-linear waveforms have been successfully implemented in a ATMEGA32 microcontroller. Experimental results show a fast execution speed and a reduced memory demand in the proposed circuit realization.
ISSN:0256-2499
0973-7677
DOI:10.1007/s12046-016-0527-2