Description: 关于FPGA流水线设计的论文
This work investigates the use of very deep pipelines for
implementing circuits in FPGAs, where each pipeline
stage is limited to a single FPGA logic element (LE). The
architecture and VHDL design of a parameterized integer
array multiplier is presented and also an IEEE 754
compliant 32-bit floating-point multiplier. We show how to
write VHDL cells that implement such approach, and how
the array multiplier architecture was adapted. Synthesis
and simulation were performed for Altera Apex20KE
devices, although the VHDL code should be portable to
other devices. For this family, a 16 bit integer multiplier
achieves a frequency of 266MHz, while the floating point
unit reaches 235MHz, performing 235 MFLOPS in an
FPGA. Additional cells are inserted to synchronize data,
what imposes significant area penalties. This and other
considerations to apply the technique in real designs are
also addressed. Platform: |
Size: 179551 |
Author:李中伟 |
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Description: 关于FPGA流水线设计的论文
This work investigates the use of very deep pipelines for
implementing circuits in FPGAs, where each pipeline
stage is limited to a single FPGA logic element (LE). The
architecture and VHDL design of a parameterized integer
array multiplier is presented and also an IEEE 754
compliant 32-bit floating-point multiplier. We show how to
write VHDL cells that implement such approach, and how
the array multiplier architecture was adapted. Synthesis
and simulation were performed for Altera Apex20KE
devices, although the VHDL code should be portable to
other devices. For this family, a 16 bit integer multiplier
achieves a frequency of 266MHz, while the floating point
unit reaches 235MHz, performing 235 MFLOPS in an
FPGA. Additional cells are inserted to synchronize data,
what imposes significant area penalties. This and other
considerations to apply the technique in real designs are
also addressed.-FPGA pipelined designs on paper This work investigates the use of very deep pipelines forimplementing circuits in FPGAs, where each pipelinestage is limited to a single FPGA logic element (LE). Thearchitecture and VHDL design of a parameterized integerarray multiplier is presented and also an IEEE 754compliant 32-bit floating-point multiplier. We show how towrite VHDL cells that implement such approach, and howthe array multiplier architecture was adapted. Synthesisand simulation were performed for Altera Apex20KEdevices, although the VHDL code should be portable toother devices. For this family, a 16 bit integer multiplierachieves a frequency of 266MHz, while the floating pointunit reaches 235MHz, performing 235 MFLOPS in anFPGA. Additional cells are inserted to synchronize data, what imposes significant area penalties. This and otherconsiderations to apply the technique in real designs arealso addressed. Platform: |
Size: 179200 |
Author:李中伟 |
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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: |
Size: 1024 |
Author:pudn |
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Description: 本设计采用AT89552单片机，辅以必要的模拟电路，实现了一个基于直接数字频率合成技术(DDS)的正弦谊号发生器。设计中采用DDS芯片AD9850产生频率1KHZ~10MHZ范围内正弦波，采用功放AD811控制输出电压幅度， 由单片机AT89S52控制调节步进频率1HZ。在此基础上，用模拟乘法器MC1496实现了正弦调制信号频率为1KHZ的模拟相度调制信号；用FPGA芯片产生二进制NRZ码,与AD9850结合实现相移键控PSK、幅移键控ASK、频移镇键FSK。-AT89552 the single-chip design, supplemented by the necessary analog circuits, based on the realization of a direct digital frequency synthesis (DDS) generator of sinusoidal No. Friends. The design of DDS chip AD9850 produced using 1KHZ ~ 10MHZ frequency range of sine wave, the AD811 control amplifier output voltage range of from single-chip AT89S52-conditioning step frequency control 1HZ. On this basis, the use of analog multiplier MC1496 has sinusoidal frequency modulation signal 1KHZ degree analog phase modulated signal generated by FPGA chip NRZ binary code, combined with the AD9850 to achieve phase shift keying PSK, ASK ASK, frequency Shift key town of FSK. Platform: |
Size: 208896 |
Author:何蓓 |
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Description: 《EDA技术实用教程》实验选编
专题一：计数分频器设计 4
专题二：存储器定制 7
实验一：快速乘法器电路设计 11
实验二：高速数字相关器设计 17
实验三：TLC5510高速A/D转换器控制 21
实验四：直接数字频率合成器（DDFS）设计 23
实验五：基于直接数字频率合成技术的任意波形发生器-" EDA technology practical course" Selected experimental one topic: the design count crossovers feature 4 2: 7 experiment a custom memory: Fast multiplier circuit design of 11 experiments II: the design of high-speed digital correlator 17, the experiment three: TLC5510 high-speed A/D converter control 21 of the experiment four: Direct Digital Frequency Synthesizer (DDFS) experimental design, 23 5: Based on Direct Digital Synthesis technology, arbitrary waveform generator Platform: |
Size: 2693120 |
Author:耿守浩 |
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Description: verilog 三分频 分频器是FPGA设计中使用频率非常高的基本设计之一，尽管在目前大部分设计中，广泛使用芯片厂家集成的锁相环资源，如altera 的PLL，Xilinx的DLL.来进行时钟的分频，倍频以及相移。-verilog-third of the frequency divider is a FPGA design, very high frequency of use, one of the basic design, although most of the designs in the current widespread use of factory-integrated PLL chip resources, such as altera of the PLL, Xilinx' s DLL. to for the sub-clock frequency multiplier and phase shift. Platform: |
Size: 1024 |
Author:杨化冰 |
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Description: Cyclone™ FPGA具有锁相环（PLL）和全局时钟网络，提供完整的时钟管理方案。Cyclone PLL具有时钟倍频和分频、相位偏移、可编程占空比和外部时钟输出，进行系统级的时钟管理和偏移控制。Altera® Quartus® II软件无需任何外部器件，就可以启用Cyclone PLL和相关功能。本文将介绍如何设计和使用Cyclone PLL功能。
PLL常用于同步内部器件时钟和外部时钟，使内部工作的时钟频率比外部时钟更高，时钟延迟和时钟偏移最小，减小或调整时钟到输出（TCO）和建立（TSU）时间。
-Cyclone ™ FPGA with a phase-locked loop (PLL) and the global clock network and provide a complete clock management solution. Cyclone PLL with the clock multiplier and divider, phase offset, programmable duty cycle and the external clock output for system-level clock management and offset control. Altera ® Quartus ® II software does not require any external devices, you can enable the Cyclone PLL and related functions. This article describes how to design and use the Cyclone PLL features. PLL clock devices commonly used in the synchronization of internal and external clock, so that the inner workings of the clock frequency higher than the external clock, clock delay and clock skew minimum, reduce or adjust the clock to the output (TCO) and the establishment of (TSU) time. Platform: |
Size: 553984 |
Author:裴雷 |
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Description: 分频器的设计，包含普通分频器和占空比为50 的奇数分频 ；4位乘法器的VHDL程序；-Crossover design, including general divider and the duty cycle of 50 of the odd frequency 4-bit multiplier VHDL procedures Platform: |
Size: 8192 |
Author:倪明 |
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Description: 应用VHDL语言写的倍频器，通过对高频信号的分频得到较低频率信号的倍频-Applications written in VHDL multiplier, high-frequency signals through low frequency signal divided by the frequency Platform: |
Size: 1024 |
Author:胡佳 |
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Description: 利用VHDL语言对FPGA进行锁相环倍频，经调试已经在开发板上实现倍频-The FPGA using VHDL language PLL frequency multiplier, the debug board has been achieved in the development of frequency Platform: |
Size: 361472 |
Author:huangshaobo |
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Description: 一个完整的已经过测量和验证的VHDL程序，测量范围从1Hz到1GHz的频率计，也可以当做计数器，通过LCD1602显示频率值，四路独立按键可以控制输出不同的频率值、控制对应的独立LED亮灭、控制蜂鸣器发声。输入的晶振频率是25MHz,不符合请自行在倍频器中更改参数。-Has been a complete VHDL program measurement and verification, measurement range from 1Hz to 1GHz frequency counter can be used as a counter LCD1602 displays frequency value, the four separate buttons can control the output frequency value, the control corresponds to an independent LEDlight off, control the buzzer. The input crystal frequency is 25MHz, does not meet your own to change the parameters in the frequency multiplier. Platform: |
Size: 1100800 |
Author:lcl |
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