Direct Digital Frequency Synthesizer Design with Modified Parabolic Method Approximation Method
Snigdha Madhab Ghosh1, Anindya Sundar Dhar2, Sunandan Bhunia3 

1Snigdha Madhab Ghosh, E&ECE Department, Indian Institute of Technology, Kharagpur, India.
2Anindya Sundar Dhar, E&ECE Department, Indian Institute of Technology, Kharagpur, India.
3Sunandan Bhunia, ECE Department, Haldia Institute of Technology, Haldia, West Bengal, India.
Manuscript received on December 02, 2011. | Revised Manuscript received on December 14, 2011. | Manuscript published on January 05, 2012. | PP: 149-153 | Volume-1 Issue-6, January 2012. | Retrieval Number: F0287111611/2012©BEIESP
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Abstract: The efficiency of the traditional DDFS is greatly depends on the large size of memory. The ROM less architecture for generating sine wave and its necessary corrective measure based on parabola has already been developed. This paper proposes a modified parabola by adding a triangular wave to achieve a sine wave with less distortion. This architecture gives better performance.
Keywords: Direct Digital Frequency Synthesizer, Parabolic approximation.