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dds_fpga
- DDS在现在运用月来越广泛,在相对带宽、频率转换时间、相位连续性、正交输出、高分辨力以及集成化等方面都远远超过了传统频率合成技术所能达到的水平,为系统提供了优于模拟信号源的性能。利用DDS技术可以很方便地实现多种信号。在FPGA上实现的DDS-DDS now to the use of more extensive relative bandwidth, frequency conversion time, phase continuity, quadrature output, high-re
shukongfenpinqi
- 数控分频器设计:对于一个加法计数器,装载不同的计数初始值时,会有不同频率的溢出输出信号。计数器溢出时,输出‘1’电平,同时溢出时的‘1’电平反馈给计数器的输入端作为装载信号;否则输出‘0’电平。 -NC divider design : an adder counter, loading the initial count value, have different frequency output signal of the overflow. Counter overflow, the
D_f_apparatus
- 频率测量和周期测量的基本方法是采用以固定时钟作为参考时钟,分别测量单个周期的计数为周期,单位时间的计数为频率。但是由于被测信号的频率不同,测量精度会发生变化,采用低频测量周期,高频测量频率,然后分别求倒数,便可得到对应的频率和周期-frequency measurement and measurement cycle is the basic method used to a fixed clock as a reference clock, measured single cycle to c
分频器FENPIN1
- EDA中常用模块VHDL程序,不同时基的计数器由同一个外部是中输入时必备的分频函数。分频器FENPIN1/2/3(50分频=1HZ,25分频=2HZ,10分频=5HZ。稍微改变程序即可实现)-EDA VHDL modules commonly used procedure, the time - with a counter by the external input is required when the sub-frequency functions. Frequency Divider
daima.用VHDL语言设计一个数字秒表
- 用VHDL语言设计一个数字秒表: 1、 秒表的计时范围是0秒~59分59.99秒,显示的最长时间为59分59秒。 2、 计时精度为10MS。 3、 复位开关可以随时使用,按下一次复位开关,计时器清零。 4、 具有开始/停止功能,按一下开关,计时器开始计时,再按一下,停止计时。系统设计分为几大部分,包括控制模块、时基分频模块、计时模块和显示模块等。其中,计时模块有分为六进制和十进制计时器。计时是对标准时钟脉冲计数。计数器由四个十进制计数器和两个六进制计数器构成,其中毫秒位、十毫秒位、秒位和
PhaseNoise.rar
- 小数分频技术解决了锁相环频率合成器中的频率分辨率和转换时间的矛盾, 但是却引入了严重的相位噪声, 传统的相位补偿方法由于对Aö D 等数字器件的要求很高并具有滞后性实现难度较大。$2 调制器对噪声具有整形的功 能, 因而将多阶的$2 调制器用于小数分频合成器中可以很好地解决他的相位噪声的问题, 大大促进了小数分频技术的 发展和应用。文章最后给出了在GHz 量级上实现的这种新型小数分频合成器的应用电路, 并测得良好的相噪性能。,Fractional-N technology to s
vhdlclock
- EDA设计实验,用VHDL编写的数字时钟代码,能显示分,秒,小时。根据所设置的频率不同,能够调整时间快慢。-EDA design of experiments, prepared by VHDL code digital clock showing the hours, seconds, hours. According to the frequency of different settings, time to adjust speed.
VGA-time-
- VGA 信号时序详解,方便了解VGA信号原理,有助开发视频相关编程-VGA signal explain. The convenience understood that the VGA signal principle, is helpful to develop the video frequency related programming
pinglvji
- 做的等精度频率计,采用等精度测量原理,即利用双计数器“相关计数”和“硬件同步分频”实现高低频率的等精度的测量。用FPGA实现频率测量、周期测量、时间间隔测量、相位测量及脉冲宽度的测量。所有的测量功能都由VHDL语言编程实现。-I do other precision frequency meter, use and other precision measuring principle, namely the use of dual-counter " related counts&qu
frequency
- 一种等精度的频率计,同时适合高频和低频,误差小。-A precision frequency meter, etc. At the same time, suitable high-frequency and low frequency, the error small.
Digital_frequency_meter
- 本项目基于等精度测量频率的原理,利用Verilog硬件描述语言设计实现了频率计内部功能模块,对传统的等精度测量方法进行了改进,增加了测量脉冲宽度的功能 采用STC89C52单片机进行数据运算处理,利用液晶显示器对测量的频率、占空比进行实时显示。充分发挥FPGA(现场可编程门阵列)的高速数据采集能力和单片机的高效计算与控制能力,使两者有机地结合起来。-The project is based on the principle of equal precision frequency measure
digital-frequency-meter
- 数字频率计的设计,1.频率测量范围:1Hz—9999Hz。 2.数字显示位数:4位数字显示。3.被测信号幅度Ui=0.5—5V(正弦波、三角波、方波)。4.测量时间:t≤1.5S-The design of digital frequency meter, 1. Frequency Range: 1Hz-9999Hz. 2. Digital Display digits: 4-digit display. 3. The measured signal amplitude Ui = 0.5-5
frequency
- 数字频率计,测量范围0-1GHZ,测周测频自动转换,精度极高,花了很长时间,不过还是有一点点小问题,有待改进.-Digital frequency meter, range 0-1GHZ, automatic conversion measured weekly frequency measurement, high precision, took a long time, but still a little small problems to be improved.
External-frequency
- 名称:频率计 内容:T0外部计数,T1计时1S,计算1S内外部脉冲个数,并在液晶显示 频率:单位时间内完成振动的次数-Name: Frequency Counter content: T0 external count, T1 timing 1S, 1S calculate the number of internal and external pulse, and the liquid crystal display frequency: per unit time to
Digital-frequency-meter
- 采用VHDL设计的数字频率计系统,测量频率范围在1HZ---10Khz,带有超量程报警和数码管分时扫描电路-VHDL design, digital frequency meter, measuring the frequency range of in 1HZ--- 10Khz, with over-range alarm and digital control of time-sharing scanning circuit
Digital-frequency-meter
- 设计了一种基于EDA的数字频率计,它主要采用的是测频法测量通常情况下,计算每秒内待测信号的脉冲个数,即闸门时间为1 s。所得的计数个数即为频率,然后输出给数码管显示。-It introduces a design based on digital frequency meter EDA, it mainly adopts frequency measurement method for measuring the is usually calculated per second, for the
Clock
- FPGA时钟显示程序,可以按照正常的时间,频率可调,数码管显示00-00-00,中间的-可改。只要采用嵌套的循环结构实现-FPGA clock display program, you can follow the normal time, frequency adjustable, digital display 00-00-00, middle- can be changed. As long as the use of a nested loop structure to achieve
plj
- 2秒闸门时间频率计,以及一个分频器,使用FPGA及verilog语言实现(2 second gate time frequency meter)
dianziqin
- 基于FPGA的电子琴动态录音与回放系统在FPGA的基础上设计系统的核心功能模块,再配合相应外围电路,在实现了电子琴基本功能的同时,还增加了演奏音乐的存储功能。(The core function module of FPGA electronic organ dynamic recording and playback system based on FPGA based, together with the corresponding peripheral circuit, in the re
chysn
- Automatic identification in the matlab environment the size of the connected area, For time-frequency analysis algorithm, Principal component analysis of multivariate data analysis projection.