您要查找的是不是：
- Chaotic dynamics behave from sampling phase-detector digital synthesizer loop 取样鉴相数字合成器环中的混沌动力学行为
- digital synthesizer loop 数字合成器环
- Through the research of direct digital synthesizer (DDS) used as a divider in phase lock loop (PLL), a frequency synthesizer with small frequency resolution ratio and high purity frequency spectrum can be realized. 摘要通过对直接数字合成器在锁相环路中作为分频器应用的研究，使频率合成器可以在实现超细频率分辨率的同时达到高的频谱纯度。
- The DDS, Direct Digital Synthesizer, which is implemented by a unique FPGA IC, can provide the stable sine signal with digital AM, FM, ASK, PSK modulation. 仅用单片FPGA就实现了直接数字频率合成技术（DDS），产生稳幅正弦波，并在数字域实现了AM、FM、ASK、PSK等四类调制信号。
- The RF down converter used with the direct digital synthesizer uncouples tuning speed from phase noise creating the fastest and highest performance tuner on the market. 由于采用了直接数字合成去耦调谐速度的射频下变频，避免了相位噪声，也创造了市场上最快的速度和最高的性能。
- All frequency injections of the receiver are controlled by a phase-locked digital synthesizer which allows incremental frequency selection in 10, 1 and 0.1 MHz steps. 接收器的所有频率注入在状态之前被控制-锁了允许第10;1和第0.;1个百万赫兹步骤的逐渐增加的频率选择的数传合成器。
- Use method (1) named "the programmable trapping wave", which is merged with frequency spectrum convert in linear ,Direct Digit Synthesizer and Surface Acoustic Wave Filter, to open a communication band in jam-band willfully. 使用融合了线性频谱搬移技术、数字频率合成技术以及声表面波滤波技术的“可编程陷波法”，在干扰频段内任意开辟出通讯频段窗口；
- direct digital synthesizer (DDS) 直接数字频率合成器
- DDS ( direct digital synthesizer) DDS（直接数字频率合成器）
- DDS (Direct Digital Synthesizer) DDS（直接数字频率合成器）
- control/direct digital synthesizer(DDS) 控制／直接数字频率合成（DDS）
- Digital waveform generator which use DDS (Direct Digital Synthesize) technology has many merits like high frequency resolution, good stability and easy to generate signal. 基于DDS技术的数字波形发生器具有频率分辨率高、稳定性好、可灵活产生多种信号的优点。
- Design of Bessel Low Pass Filter in Direct Digital Synthesizer 直接数字合成器中贝塞尔低通滤波器设计
- An Improved Direct Digital Synthesizer with Reduced Spurious Noise 一种减少杂散的直接数字频率合成器改进结构
- Direct Digital Synthesizer (DDS) and Performance Analysis 直接数字频率合成器(DDS)及其性能分析
- These theories provide a guide for designing and analyzing digitally synthesized signals with a specified SNR requirement. 这些理论，对于设计满足一定信噪比要求的数字波形合成器及对其性能的分析具有指导意义。
- Chaos from PLL of Digital Synthesizer with Trigon Sampling Phase-Detector 三角形取样鉴相数字合成器锁相环中的混沌
- Design of a Novel Frequency Sweeper Using Direct Digital Synthesizer 新型直接数字合成式扫频仪的原理和研制
- Most of the computers we are using are digital computers. 我们正在使用的计算机大多数是数字计算机。
- Musical Instrument Digital Interface, or MIDI, is a communication interface provided on virtually every synthesizer made today. 音乐设备数字接口，或称MIDI, 实际上是为目前制造的各种合成器提供的一种通信接口。
