频率合成

论文确定了硬件和软件方案，将系统分为主控模块、频率合成模块、LCD显示模块、滤波模块和通信模块等几大部分，实现了设计的功能要求。

The thesis confirms the programs of hardware and software and divides the whole system into some parts , such as control module , DDS module , LCD display module , filtering module and communication module . It carries the function requirement of this design into effect .

该文介绍了直接数字频率合成原理，分析了在没有相位截断和D／A转换器理想情况下，正弦波输出及脉冲输出中的杂散分量。

This paper introduces the principle of DDS , and analyzes the spurious components of sine wave output and square wave output on condition that there is no phase truncation and the D / A converter is ideal .

P波段瞬态极化雷达频率合成控制组件设计

Design of Frequency Synthesizer Control Modules of P-band Instantaneous Polarization Radar System

生成跳频射频源的技术，就是直接数字式频率合成技术，技术简称DDS（DirectDigitalFrequencysynthesizer）技术。

This technology is DDS ( Direct Digital Frequency Synthesizer ) .

CPU控制的数字锁相环频率合成系统的FPGA实现

Realization of digital PLL frequency synthesizer with CPU controlling on FPGA

微机数控频率合成式PWM交流调速系统

PWM AC Speed Adjusting System with Frequency Synthesis Digitally-controlled by Microcomputer

用FPGA实现直接数字频率合成

Direct Digital Synthesis ( DDS ) using FPGA

基于FPGA直接数字频率合成两种控制电路设计

Two Kinds of Control Circuit Design For Direct Digital Frequency Synthesis Based on FPGA

数字频率合成附加信道（SCA）调制器

Digital Frequency Synthesizer Subsidiary Communications Authorization ( SCA ) Modulator

本文讨论一种基于I／Q调节的频率合成方法。

In this paper , a frequency synthesizer technique based on I / Q adjustment is discussed .

DDS技术在频率合成领域取得了广泛的应用。

The DDS technology was widely used in frequence synthesis field .

本文充分利用了这两种方式的优点，实现了一种能完全覆盖C频段的宽带低相位噪声频率合成源设计。

A scheme of wide-band low phase noise frequency source for C band is presented by making the best of the advantages of the two modes .

线性调频信号DDS频率合成源的设计与实现

Development of DDS Digital Synthetic Frequency for Chirp Signal Generation

采用DDS频率合成的虚拟信号发生器研究

Research on Virtual Signal Generator Based on DDS Frequency Synthesizer

基于DDS技术的频率合成源设计

Design of Frequency Synthesizes Source Based on DDS Technology

直接数字频率合成（简称DDS）技术是当前应用较广泛的频率合成技术。

Direct Digital frequency Synthesis ( DDS ) is widely used in frequency synthesis .

本文采用了数字频率合成技术（DDS）来产生调制信号，它具有超宽的频率带宽、超高的频率分辨率和相位连续性等特点，可以实现声光调制信号的频率和振幅的高稳定性。

The modulating signal is generated in the way of Direct Digital Synthesizer technology .

UHF单环跳频频率合成技术的研究

Research of a Single-loop Hopping Frequenc Synthetic Technique at UHF Frequenc Band

直接数字频率合成单象限存储结构的VHDL语言实现

Single-quadrant storage structure described by VHDL in DDS

方法：根据数字频率合成理论，基于FPGA实现了多频信号源的核心部分。

Method Based on the digital frequency synthesis theory and FPGA , the main part of a multi-frequency signal source is accomplished .

在本文工作的第二部分，对DDS混合PLL的多种频率合成方法，进行了性能分析。

Give the design methods of common active filters of DDS hybrid PLL frequency synthesizers .

频综源采用直接数字频率合成（DDS）加倍频、混频方案。

The scheme adopted in the source is Direct Digital Frequency Synthesis by frequency doubling and mixing .

DDS是近几年发展起来的新型频率合成技术，具有为广阔的应用前景。

DDS is a new frequency-synthesis technology developed in recent years , it has a bright prospect .

直接数字合成器（DirectDigitalSynthesizer，DDS）是近年来迅速发展起来的频率合成技术，具有频率分辨率高、频率捷变等诸多优点。

Direct digital synthesizer ( DDS ) is a rapidly developing frequency synthesis technology . It has high frequency resolution and extremely fast hopping speed .

直接数字合成（DirectDigitalSynthesize，DDS）是一种重要的频率合成技术，具有分辨率高，频率变换快等优点。

Direct digital synthesize ( DDS ) is an important technology in the frequency synthesizing with some advantages of higher frequency resolution , faster frequency transform etc.

基于CORDIC算法的高速直接数字频率合成技术的ASIC实现

ASIC Realization of High Speed Direct Digital Frequency Synthesizer Based on CORDIC Algorithm

采用高精度的直接数字频率合成（DDS）和数字锁相环技术，实现了高频率跟踪精度。

DDS and digital phrase-lock technology have been applied in FPGA to improve the accuracy of frequency tracking .

ERT数据采集系统信号发生器模块通常有模拟式和直接数字频率合成（DirectDigitalFrequencysynthesizer，简称DDS）式两种类型。

Signal generator module of ERT data acquisition system usually has two styles : the simulation and Direct Digital Frequency synthesizer . ( DDS ) .

介绍了频率合成的概念，分析了DDS的工作原理及其基本结构。

Introduces the concept of frequency synthesis , it has analyzed the principle and the basic structure of DDS .

系统采用计算机控制下的直接数字频率合成（DDS）技术，实现电调谐波长扫描。

Using DDS ( Direct Digital Synthesizer ) technique under control of single-chip computer , electronic-tunable wavelength scanning is realized .