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[Other resource] 基于FPGA的直接数字合成器设计

Description: 1、 利用FLEX10的片内RAM资源，根据DDS原理，设计产生正弦信号的各功能模块和顶层原理图； 2、 利用实验板上的TLC7259转换器，将1中得到的正弦信号，通过D/A转换，通过ME5534滤波后在示波器上观察； 3、 输出波形要求： 在输入时钟频率为16KHz时，输出正弦波分辨率达到1Hz； 在输入时钟频率为4MHz时，输出正弦波分辨率达到256Hz； 4、 通过RS232C通信，实现FPGA和PC机之间串行通信，从而实现用PC机改变频率控制字，实现对输出正弦波频率的控制。-a use FLEX10-chip RAM resources, in accordance with DDS principle, design sinusoidal signal generated by the top-level functional modules and schematics; 2, the experimental board TLC7259 converters, will be a sinusoidal signal, the D / A conversion, after filtering through the ME5534 oscilloscope observation; 3, the output waveform requirements : the input clock frequency of 16KHz, sine wave output resolution of 1Hz; the input clock frequency of 4MHz, the sine wave output resolution of 256Hz; 4, RS232C communications, FPGA and PC serial communications between in order to achieve PC-frequency control characters, the realization of sine wave output frequency control.
Platform: | Size: 22183 | Author: 竺玲玲 | Hits:

[VHDL-FPGA-Verilog] 基于FPGA的直接数字合成器设计

Description: 1、 利用FLEX10的片内RAM资源，根据DDS原理，设计产生正弦信号的各功能模块和顶层原理图； 2、 利用实验板上的TLC7259转换器，将1中得到的正弦信号，通过D/A转换，通过ME5534滤波后在示波器上观察； 3、 输出波形要求： 在输入时钟频率为16KHz时，输出正弦波分辨率达到1Hz； 在输入时钟频率为4MHz时，输出正弦波分辨率达到256Hz； 4、 通过RS232C通信，实现FPGA和PC机之间串行通信，从而实现用PC机改变频率控制字，实现对输出正弦波频率的控制。-a use FLEX10-chip RAM resources, in accordance with DDS principle, design sinusoidal signal generated by the top-level functional modules and schematics; 2, the experimental board TLC7259 converters, will be a sinusoidal signal, the D/A conversion, after filtering through the ME5534 oscilloscope observation; 3, the output waveform requirements : the input clock frequency of 16KHz, sine wave output resolution of 1Hz; the input clock frequency of 4MHz, the sine wave output resolution of 256Hz; 4, RS232C communications, FPGA and PC serial communications between in order to achieve PC-frequency control characters, the realization of sine wave output frequency control.
Platform: | Size: 21504 | Author: 竺玲玲 | Hits:

[assembly language] EXPT84_DAC2ADC

Description: FPGA+DA转换,ALTERA公司FPGA与DA实现,DA转换功能!-FPGA+ DA conversion, ALTERA company FPGA and DA realize, DA conversion!
Platform: | Size: 16384 | Author: 19820521 | Hits:

[Embeded-SCM Develop] expt12_5_rsv

Description: 基于fpga和sopc的用VHDL语言编写的EDA采样高速A/D的存储示波器-FPGA and SOPC based on the use of VHDL language EDA sampling high-speed A/D of the storage oscilloscope
Platform: | Size: 58368 | Author: 多幅撒 | Hits:

[VHDL-FPGA-Verilog] FPGA-based-DAC

Description: 用fpga实现的DA转换器，有说明和源码，VDHL文件。 A PLD Based Delta-Sigma DAC Delta-Sigma modulation is the simple, yet powerful, technique responsible for the extraordinary performance and low cost of today s audio CD players. The simplest Delta-Sigma DAC consists of a Delta-Sigma modulator and a one bit DAC. Since, both of these components can be realized using digital circuits, it is possible to implement a low precision Delta-Sigma DAC using a PLD.-Using FPGA to achieve the DA converter, has descriptions and source code, VDHL document. A PLD Based Delta-Sigma DACDelta-Sigma modulation is the simple, yet powerful, technique responsible for the extraordinaryperformance and low cost of today s audio CDplayers. The simplest Delta-Sigma DAC consists of aDelta-Sigma modulator and a one bit DAC. Since , both of these components can be realized usingdigital circuits, it is possible to implement a lowprecision Delta-Sigma DAC using a PLD.
Platform: | Size: 58368 | Author: 开心 | Hits:

[Other Embeded program] exp1

Description: 基于FPGA的A/D转换 可以用quartusII仿真-FPGA-based A/D conversion can be used quartusII Simulation
Platform: | Size: 5702656 | Author: | Hits:

[VHDL-FPGA-Verilog] FPGA-LCD1602

Description: 基于FPGA的LCD1602显示，可根据实际内容修改显示内容-FPGA-based LCD1602 display can be modified according to the actual contents of display content
Platform: | Size: 489472 | Author: 冀少威 | Hits:

[VHDL-FPGA-Verilog] fpga

Description: 无线光通信技术具有通信容量大、传输速率高等众多优点, 在许多场合都有重要的应用, 是现代通信技术研究的一个热点。由于脉冲位置调制 ( PPM ) 有较高的平均功率利用率和抗干扰能力, 故 PPM是无线光通信系统中常用的调制方式。在研究 PPM调制技术的基础上, 就基于 FPG A的无线光通信 PPM调制系统进行设计, 并用 V H D L语言完成了系统的设计和仿真。仿真结果表明, 该设计具有正确性和合理性。-Wireless optical communication technology has the communications capacity, many of the benefits of higher transmission rates, in many occasions have important applications in modern communication technologies are a hot research. Because of pulse position modulation (PPM) have a higher average power utilization and anti-interference ability, so PPM is a wireless optical communication system commonly used in modulation. PPM modulation technique in the study on the basis of FPG A based on wireless optical communication PPM modulation system design, and VHDL language achieve the system design and simulation. Simulation results show that the rationality of the design right.
Platform: | Size: 194560 | Author: 朱雯 | Hits:

[Other] dac900

Description: ti dac900,高性能D/A转换芯片,很好的片子，大家可以看一下-The DAC900 is a high-speed, Digital-to-Analog Converter (DAC) offering a 10-bit resolution option within the SpeedPlus family of high-performance converters. Featuring pin compatibility among family members, the DAC908, DAC902, and DAC904 provide a component selection option to an 8-, 12-, and 14-bit resolution, respectively.
Platform: | Size: 586752 | Author: www | Hits:

[VHDL-FPGA-Verilog] TKC7524jiekoudianluchengxu

Description: 根据TLC7524输出控制时序，利用接口电路图，通过改变输出数据，设计一个正弦波发生器。TLC7524是8位的D/A转换器，转换周期为 ，所以锯齿波型数据有256个点构成，每个点的数据长度为8位。.FPGA的系统时钟为 ，通过对其进行5分频处理，得到频率为 的正弦波-TLC7524 output under the control of timing, the use of interface circuit, by changing the output data, the design of a sine wave generator. TLC7524 8-bit D/A converter, the conversion cycle, so sawtooth 256 data points, each point of the data length of 8. . FPGA system clock as, through its 5-band processing, the frequency of the sine wave
Platform: | Size: 1024 | Author: 离火 | Hits:

[Software Engineering] FPGA

Description: 为了满足科研与实验需要,提出并实现了一种以FPGA和高速D/A为核心,其结构简单,控制灵活,信号质量高的多功能信号源生成系统。该信号源生成系统能够实时产生中心频率在30~130 MHz的各种雷达、通信、导航和白噪声等信号,且产生的各种信号频率、幅度、相位和其他参数均可控。信号源作为基带信号单元配以混频模块,可实现在任意频段的信号。另外,该信号源还可以作为一个通用平台,通过FPGA内部程序的更新来实现其他复杂信号。-This paper presents and makes a multi-functional signal source based on FPGA and high speed D/A which has simple configuration,flexible controlling,and top-quality signals to satisfy needs of the scientific research and experiment.This signal source can generate several signals as radar signals,communication signals,navigation signals,noise signals and so on.These signals have center frequency between 30~130 MHz,its frequency,power,phase and other parameters are adjustable.This signal source can also ...
Platform: | Size: 330752 | Author: 将建 | Hits:

[Embeded-SCM Develop] verilog_FPGA_DDC

Description: 这是一个用verilog HDL实现的实现数字下变频的源代码。-This is a verilog HDL used to achieve the realization of digital down conversion of the source code.
Platform: | Size: 2790400 | Author: 王坤 | Hits:

[3G develop] src

Description: DQPSK modulation with XILINX FPGA. 2 level butterworth analog filter for I & Q D/A output. -DQPSK modulation with XILINX FPGA. 2 level butterworth analog filter for I & Q D/A output.
Platform: | Size: 60416 | Author: youker | Hits:

[Other] jj

Description: 本题设计一个数字存储示波器，以Xilinx公司20万门FPGA芯片为核心，辅以必要的外围电路（包括信号调理、采样保持、内部触发、A/D转换、D/A转换和I/O模块），利用VHDL语言编程，实现了任意波形的单次触发、连续触发和存储回放功能，并按要求进行了垂直灵敏度和扫描速度的挡位设置。信号采集时，将外部输入信号经信号调理模块调节到A/D电路输入范围，经A/D转换后送入FPGA内部的双口RAM进行高速缓存，并将结果通过D/A转换送给通用示波器进行显示，完成了对中、低频信号的实时采样和高频信号的等效采样和数据存储回放。经测试，系统整体指标良好，垂直灵敏度和扫描速度等各项指标均达到设计要求。-The problem to design a digital storage oscilloscope, to Xilinx, 200,000 FPGA chip as the core, supplemented by the necessary peripherals (including signal conditioning, sample and hold, internal trigger, A/D converter, D/A conversion and I/O modules) the use of VHDL language programming, arbitrary waveform one-shot, continuous playback is triggered, and storage, in accordance with the requirements of the vertical sensitivity and sweep speed of the gear set. Signal acquisition, it will be the external input signal conditioning by the signal conditioning modules to the A/D circuit input range, after A/D converted into the FPGA s internal dual-port RAM for high-speed cache, and the results through the D/A converter to give general oscilloscope shows completed, the low-frequency signals in real-time sampling and high-frequency signals equivalent sampling and data storage playback. Been tested, the system as a whole indices are good, the vertical sensitivity and scan speed indicators meet
Platform: | Size: 546816 | Author: 黄奇家 | Hits:

[VHDL-FPGA-Verilog] eda

Description: 利用FPGA可编程芯片及Verilog HDL语言实现了对直流电机PwM控制器的设计，对直流电机速度进行控制。介绍了用Verilog HDL语言编程实现直流电机PwM控制器的PwM产生模块、串口通信模块、转向调节模块等功能，该系统无须外接D／A转换器及模拟比较器，结构简单，控制精度高，有广泛的应用前景。同时，控制系统中引入上位机控制功能，可方便对电机进行远程控制。-Using FPGA programmable chip and Verilog HDL language for the design of DC motor PwM controller, DC motor speed control. Introduced with the Verilog HDL language programming controller PwM DC PwM generated module, serial communication module, steering adjustment module and other functions, the system is an external D/A converters and analog comparators, simple structure, high control precision, there a wide range of applications. Meanwhile, the introduction of PC control system control functions can be easily remote control the motor.
Platform: | Size: 4268032 | Author: 杨汉轩 | Hits:

[Software Engineering] FPGA

Description: 关于FPGA的A/D（ADS7844）转换器电路设计-On the FPGA of the A/D converter circuit design
Platform: | Size: 261120 | Author: keya | Hits:

[VHDL-FPGA-Verilog] D_latch

Description: 周立功 ACTEl FPGA做的一个D触发器程序-ZLG ACTEl FPGA program to do a D flip-flop
Platform: | Size: 770048 | Author: 张金 | Hits:

[SCM] dfefe.doc

Description: 该高频正弦信号发生器基于直接数字频率合成（DDS）和数字锁相环技术（DPLL），以微控制器（MCU）和现场可编程逻辑门阵列（FPGA）为核心，辅以必要的外围电路设计而成。系统主要由正弦信号发生、红外遥控、高速模数（A/D）－数模（D/A）转换、信号调制和后级处理等模块组成。-The high-frequency sinusoidal signal generator based on Direct Digital Synthesis (DDS) and digital PLL (DPLL), a microcontroller (MCU) and field programmable gate array (FPGA) as the core, supplemented by the necessary peripheral from circuit design. System is composed of sinusoidal signal, infrared remote control, high-speed module (A/D)- digital-analog (D/A) conversion, signal modulation and post-level processing modules.
Platform: | Size: 243712 | Author: henry | Hits:

[VHDL-FPGA-Verilog] FPGA--SIGNAL-FFT-FIR

Description: 目前,在极高频率的电子装置或系统中不能采用数字信号处理的原因有两个:一是A/D转换器的速度不能达到足够快 二是信号处理任务太复杂,达不到实时处理的要求.-At present, in the high frequency of the electronic device or system cannot use the digital signal processing for two reasons: one is the A/D converter cannot reach the speed of fast enough Second is the signal processing tasks too complex, can not reach the real-time process requirements.
Platform: | Size: 20480 | Author: 飞翔 | Hits:

[VHDL-FPGA-Verilog] FPGA

Description: ⑴实验要求基本要求： ①设置一个复位键，按下按键输出电压清零 ②设置两个功能键，控制输出电压以0.2V的步长进行加减。(Pin sets a reset button, press the button to output the voltage reset You set two function keys to control the output voltage by 0.2v step size.)
Platform: | Size: 1024 | Author: 孟欢520 | Hits:
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