FPGA-Based Multichannel Digital Duty-Cycle Modulation and Application to Simultaneous Generation of Analog Signals

Autori

  • Moffo Lonla Bertrand Research: Research Group in Industrial Computing and Automation (GR2IA) University: University of Douala
  • Jean Mbihi
  • Leandre Nneme Nneme

Parole chiave:

Multichannel, DDCM, FPGA, Low frequency generator, Instrumentation systems

Abstract

The DCM (duty-cycle modulation) is used in industrial electronics as a special technique for producing switching time-varying periodic waves, with variable pulse width and modulation period. As an implication, unlike the fixed period of a PWM wave, the cyclic ratio of a DCM signal changes as a function of the modulating input according to a known function. However, most existing research works related to DCM-based instrumentation systems, are limited to single-channel contexts. In this paper, a multichannel DDCM (Digital Duty-Dycle Modulation) scheme is developed. It consists of an extended pre-computed DDCM data map which significantly reduces the overall DSP (digital signal processing) time, and a piece of dual DDCM counting logic with a downstream zero order holder per analog channel. It is used to build a well tested 4-channel FPGA-based signal generator with 10–12 bits resolution.Keywords: Multichannel, DDCM, FPGA, low frequency generator, instrumentation systems

Biografia autore

  • Moffo Lonla Bertrand, Research: Research Group in Industrial Computing and Automation (GR2IA) University: University of Douala
    Dr Moffo Lonla BertrandLecturerDepartement of Computer ScienceHTTTC-KumbaUniversity of Buea

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Pubblicato

2017-05-22

Fascicolo

V. 8 N. 1 (2017)

Sezione

Research Articles

Licenza

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