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...
PROBLEM TO BE SOLVED: To prevent a circuit scale from being enlarged by utilizing time base information when an accumulated value of an accumulator is increasing and obtaining the output of the synthesizer, thereby eliminating the occurrence of spurious radiation due to periodic frequency fluctuation....
Implementation of digital signal processing techniques relies on computing platforms such as very large-scale integrated circuits that increasingly benefit from Moore’s law: the number of transistors in a dense integrated circuit (IC) doubled about every two years. This lead to gradual cost and per...
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...
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...
AD9912是AD公司(Analog Devices)的一款直接数字频率合成和调制器产品,AD9912是1 GSPS Direct Digital Synthesizer with 14-Bit DAC,本页介绍了AD9912的典型设计图、优势和特点、评估套件等。
Direct digital synthesizer 优质文献 相似文献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 sp...
发明人: ツアフリールシエフア 摘要: In 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. <IMAGE>收藏...
DIRECT DIGITAL SYNTHESIZER (DDS) TECHNOLOGY OVERVIEW Novatech Instruments, Inc. specializes in developing signal generator products using DDS technology. This technology makes it possible to provide programmable clock and sinewave generators that are phase continuous, phase synchronous, phase aligned and/or...
DIRECT DIGITAL SYNTHESIZER (DDS) TECHNOLOGY OVERVIEW Novatech Instruments, Inc. specializes in developing signal generator products using DDS technology. This technology makes it possible to provide programmable clock and sinewave generators that are phase continuous, phase synchronous, phase aligned and/or...