A ROM-Less Direct Digital Frequency Synthesizer Based on Bezier Curve Approximation
نویسنده
چکیده
This paper describes the design and implementation of a ROM-Less Direct Digital Frequency Synthesizer (DDS) using Bezier curve approximation. With Bezier curve approximation, phase values between 0 to π are mapped to sine amplitudes. Then, half wave symmetry of sine wave is exploited to construct full sine wave. The proposed approximation introduces maximum error of 7.9×10, which is equivalent to quantized sinusoid with 16-bit amplitude resolution. This yields very high spectrally pure sine wave output. Based on the approximation, DDS circuit is designed and validated in Matlab-Simulink. Keywords—Direct Digital Frequency Synthesizer, ROMLess DDS, Bezier curve approximation.
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