Direct digital synthesizerIn a direct digital synthesizer providing a frequency modulated output the modulation input is bit shifted and the rate of the direct digital synthesizer phase accumulation is controlled to provide enhanced FM deviation resolution. ツアフリールシエフア ...
直接数字式频率合成器DDS(Direct Digital Synthesizer),实际上是一种分频器:通过编程频率控制字来分频系统时钟(SYSTEM CLOCK)以产生所需要的频率。 DDS 有两个突出的特点,一方面,DDS工作在数字域,一旦更新频率控制字,输出的频率就相应改变,其跳频速率高;另一方面,由于频率控制字的宽度宽(48bit 或 者更高),频率分辨...
A direct digital synthesizer (DDS) for generating a waveform output according to a frequency input and a clock signal is provided. The direct digital synthesizer includes: a code generator for generating a digital code in response to the frequency input and the clock signal, a digital-analog con...
5.1.5 Direct digital synthesis Direct digital synthesis is a method for radio frequency wave generation that allows precise digital control over frequency, phase and amplitude is. A direct digital synthesizer (DDS) generates waveforms digitally instead of being based on an analog oscillator as in the...
A Direct Digital Synthesizer (DDS) is an integral part of all modern communication systems. It is a technique to produce a desired waveform, usually a sinusoid, through employing digital signal processing algorithms. As an example, in the transmitter (Tx) of a digital communication system, a Lo...
not available for EP081564of corresponding document:A frequency synthesizer which uses a direct digital synthesizer (DDS) to generate a highly accurate periodic signal of a frequency selected from a plurality of reference frequencies. The DDS output signal is bandpass filtered utilizing a clean-up ph...
The optimization of direct digital frequency synthesizer performance in the presence of finite word length effects Techniques for the design of VLSI architectures for direct digital frequency synthesis have been introduced that allow for the optimization of the spurio... HTN Iii,H Samueli,B Kim - ...
The utility model discloses a direct digital synthesizer (DDS) signal source based on control of a signal chip microcomputer, which comprises a power source module, a signal generating module, a signal output module and a signal amplitude amplifying circuit. The signal generating module comprises a...
《【预订】Low Power Direct Digital Frequency Synthesizer Using》,作者:【预订】Low Power Direct Digital Frequency Synthesizer UsingMohamed Elsayes 著,出版社:VDM Verlag Dr. MullerAktiengesellschaft & Co. ,ISBN:9783639261974。
A direct digital synthesizer (DDS) for generating an output periodic waveform from a stored digital waveform has a linear feedback shift register coonfigured as a counter. The linear feedback shift register is clocked by the internal reference clock of the DDS, and a predetermined output of the...