Description: 现代电子系统课程设计
基于DDS技术利用VHDL设计并制作一个数字式移相信号发生器。
（1）基本要求：
a．频率范围：1Hz～4kHz，频率步进为1Hz，输出频率可预置。
b．A、B两路正弦信号输出，10位输出数据宽度
c．相位差范围为0～359°，步进为1.4°，相位差值可预置。
d．数字显示预置的频率（10进制）、相位差值。
（2）发挥部分
a．修改设计，增加幅度控制电路（如可以用一乘法器控制输出幅度）。
b．输出幅度峰峰值0.1～3.0V，步距0.1V，显示预置值。
-Modern electronic system design is based on DDS technology courses use VHDL to design and produce a digital shift Signal Generator. (1) the basic requirements: a. Frequency range: 1Hz ~ 4kHz, frequency step for the 1Hz, output frequency can be preset. b. A, B two sinusoidal signal output, 10-bit output data width c. Phase difference range of 0 ~ 359 °, stepping to 1.4 °, the phase difference value can be preset. d. Figures show that the frequency of Preferences (10 M), phase difference value. (2) to play a part of a. Modify the design to increase the rate of control circuit (for example, could use a multiplier to control the output rate). b. Peak-to-peak output rate of 0.1 ~ 3.0V, step 0.1V, show preset value. Platform: |
Size: 174080 |
Author:耳边 |
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Description: 基于状态图的光电编码器4倍频vhdl程序，输入相位差90度的两相，输出倍频和方向信号-Based on the state of the optical encoder Figure 4 multiplier vhdl procedure, enter a 90-degree phase difference of two-phase, frequency and direction of the output signal Platform: |
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Author:pudn |
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Description: vhdl,Digital phase modulation is also known as phase shift keying, 2DPSK is binary differential phase shift keying, is a kind of digital phase modulation. Digital phase modulation using carrier phase change to transmit digital signal, usually can be divided into it absolute phase shift ( BPSK ) and the relative phase shift ( DPSK ). Relative phase shift is the use of digital information and the adjacent symbols to determine relative carrier phase difference carrier phase. This paper mainly introduces the 2DPSK modulation and demodulation process and the use of phase selection method to achieve the process. And the principle of the key analysis, including modulation and demodulation principle, as well as in the modulation and the demodulation process utilizing principle to achieve absolute code and relative code generation.-Digital phase modulation is also known as phase shift keying, 2DPSK is binary differential phase shift keying, is a kind of digital phase modulation. Digital phase modulation using carrier phase change to transmit digital signal, usually can be divided into it absolute phase shift ( BPSK ) and the relative phase shift ( DPSK ). Relative phase shift is the use of digital information and the adjacent symbols to determine relative carrier phase difference carrier phase. This paper mainly introduces the 2DPSK modulation and demodulation process and the use of phase selection method to achieve the process. And the principle of the key analysis, including modulation and demodulation principle, as well as in the modulation and the demodulation process utilizing principle to achieve absolute code and relative code generation. Platform: |
Size: 1910784 |
Author:乐逍遥 |
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Description: VHDL,简易音频数字相位表的设计与实现 数字相位测量仪在工业领域中经常用到的一般测量工具，主要应用与同频率正弦信号间的相位差的测量显示。
本系统采用FPGA实现测量的核心部分，主要由数字鉴相、累加计数器、控制器以及寄存与显示译码电路组成。该系统硬件电路简单，整个系统采用硬件描述语言VHDL作为系统内部硬件结构的描述手段，在XILINX公司的ISE9.1的软件支持下完成。可以对20Hz~20kHz频率范围内的音频信号进行采样鉴相处理，并将数据传回FPGA进行相位差计数累加、测量运算，最后送显示译码电路显示，测相范围为 ，相位测量误差 < 。
经测试结果验证，本系统充分利用FPGA对数据的高速处理能力，是系统设计高效、可靠，处理速度快，稳定性高，易于实现。
-VHDL, simple audio digital phase Table Design and Implementation of the digital phase meter general measurement tools are often used in the industrial field, the measurement of the phase difference between the main application with the same frequency sinusoidal signal. The system uses the FPGA implementation of the core part of the measurement, mainly by the digital phase, cumulative counter, the decoding circuit of the controller as well as storage and display. The system hardware circuit is simple, and the entire system using hardware description language VHDL system means a description of the internal hardware structure, completed in the XILINX company ISE9.1 software support. The audio signal in the frequency range of 20Hz ~ 20kHz sampling KAM-phase process, and the data returned FPGA retardation counted accumulation measuring operation, and finally sent to the decoding circuit, the scope of the measurement phase, the phase measurement error < . The test results verify the full u Platform: |
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Description: VHDL代码，源用与两路DDS之间的相位差，现可用于产生相位差可编程的1m时钟，精度可精确到0.01分。输出两路时钟，带起始控制位-VHDL code, source with the phase difference between the two DDS, can now be used to produce 1m phase programmable clock accuracy can be accurate to 0.01 points. Output two clocks with start control bit Platform: |
Size: 1024 |
Author:houjiajun |
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Description: 采用FPGA（现场可编程门序列）编写VHDL语言设计多路同步脉冲发生器，对信号进行分频处理，实现四路信号相位相差T/16和T/8的延迟相位输出，实现的四路脉冲与传统的脉冲同步器不同，它具有高集成度，高通用性，容易调整和高可靠性等特点。(Using FPGA (field programmable gate sequence) to write VHDL language to design multi-channel synchronous pulse generator, to divide the frequency of the signal, to achieve the four-way signal phase difference T / 16 and T / 8 delay phase output, the realization of the four-way pulse is different from the traditional pulse synchronizer, it has the characteristics of high integration, high-throughput, easy adjustment and high reliability.) Platform: |
Size: 10240 |
Author:哈哈哈哈daxiao |
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