Microcontroller Based Direct Digital Synthesizer and FSK Modulator
Mahesh Bilagi1, Manjunath Lakkannavar2
1Mahesh Bilagi, VLSI And Embedded System VTU Extension Center, UTL Technologies Ltd, Bangalore, India.
2Manjunath Lakkannavar,  Lecturer, VTU Extension Center UTL Technologies Ltd, Bangalore, India.
Manuscript received on September 23, 2013. | Revised Manuscript received on October 09, 2013. | Manuscript published on October 30, 2013. | PP: 217-220  | Volume-3, Issue-1, October 2013. | Retrieval Number:  A2221103113/2013©BEIESP

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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract:  Many possibilities for frequency generation are open to a designer, ranging from phase-locked-loop (PLL)- based techniques or very high-frequency synthesis, to dynamic programming of digital- analog converter (DAC) outputs to generate arbitrary waveforms at lower frequencies. But DDS’s ability to accurately produce and control waveforms of various frequencies and profiles has become a key requirement common to a number of industries. Whether providing lively sources of low phase-noise variable-frequencies with good spurious performance for communications, or simply generating a frequency stimulus in industrial or biomedical test equipment applications, convenience, compactness and low cost are important design considerations.
Keywords: DDS and Digital to analog converter.