VSWR value measurement analysis using Direct Digital Synthesizer

An Improved Analog Waveforms Generation Technique using Direct Digital Synthesizer

In many kinds of equipment, it is important to produce readily control accurate waveforms of various frequencies and profiles such as agile frequency sources with low phase noise and low spurious signal content for communications, and simply generated frequency for industrial and biomedical applications. A direct digital synthesizer (DDS) provides many significant advantages over the PLL approa...

Reduced-Memory Direct Digital Frequency Synthesizer Using Parabolic Initial Guess

Based on the parabolic approximation, which was recently introduced by the authors, a new architecture for sine-output direct digital frequency synthesizers has been developed. Due to using this approximation, and also considering several memory-reduction techniques, the proposed architecture is so designed that needs only 728 bits read-only memory for mapping a 12-bit phase address to 10-bit s...

Pentomics Patents: Direct Digital Frequency Synthesizer

Direct Digital Frequency Synthesizer Pentomics’ first DDS patent concerns a method and apparatus for DDS which, unlike the traditional table-lookup methods, uses a simplified “angle-rotation” algorithm implemented as a multiplierless feedforward datapath, allowing easy pipelining and limiting the accumulation of roundoff errors. Our DDS’s modular architecture permits outputs of arbitrary precis...

An optimized Direct Digital Frequency Synthesizer (DDFS)

An optimized Direct Digital Frequency Synthesizer (DDFS) design in terms of reduced ROM, high throughput and speed is designed in this paper. DDFS is designed with 200 MHz reference clock frequency and 32 bit FTW for the generation of sine and cosine signal with 16 bit output frequency having frequency resolution of 0.0466 Hz and Phase resolution of 0.0055°. DDFS design is simulated using VHDL ...

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