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可产生矩形脉冲和正弦信号,矩形脉冲的脉宽可以改变,正弦信号则可以改变频率和时宽-Can produce rectangular pulse and sinusoidal signal, the rectangular pulse width can be changed, sinusoidal signal can be changed when the frequency and width
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主要目的就是要从传感器中收到两个正弦信号,用单片机进行计数。并传送到上位机来进行显示。
SPEED为采集到正弦信号并用T0,T1来计数。知道16位计数器能够一次计完。
用T2来设定波特率。并发送计数器计的脉冲个数。假如上位机的接受信号为58。- The main aim is received from the sensors two sinusoidal signals with a microcontroller to count. And send to the host
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虚拟信号发生器是一个GUI产生(1)周期函数(包括正弦,三角,锯齿,和方波)不同振幅,频率和阶段 (2)不同振幅平方脉冲序列,频率,分期及职责循环 (3)双参数指数函数 (4)高斯曲线之间的范围不同,标准偏差和手段,以及(5)不同幅度的高斯噪声。你也可以添加一个偏移或高斯噪声的前四个以上任何职能。图形用户界面还能使用户可以添加指定的信号(或者乘以它的)一个先前定义的信号。
-Virtual Signal Generator is a GUI that produces (1) periodi
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脉冲编码调制(PCM)实现
编程实现PCM技术的三个过程:采样、量化与编码。
采样:低通连续信号采样,以 x=sin(200*t) m=x./(200*t) m=m.*m 为例说明低通采样定理,绘出信号时、频图形;带通连续信号采样,以x=sin(20*t) m=x./t 为例说明带通采样定理,绘出信号时、频图形。
量化:均匀量化,以幅度 的正弦信号为例实现为64级电平的均匀量化;非均匀量化,输入A律PCM编码器的正弦信号 ,采样序列为 ,将其进行PCM编码,给出编码器的输出码组序列
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Quadrature amplitude modulation (QAM) is a modulation scheme in which two sinusoidal carriers,
one exactly 90 degrees out of phase with respect to the other, are used to transmit data over
a given physical channel. One signal is called the I sign
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This paper presents theoretical and experimental
aspects related to the implementation of a Digital Signal
Processor (DSP) based Sinusoidal Pulse Width Modulation
(SPWM) for single phase inverter.
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This paper presents theoretical and experimental
aspects related to the implementation of a Digital Signal
Processor (DSP) based Sinusoidal Pulse Width Modulation
(SPWM) for single phase inverter.
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This paper presents theoretical and experimental
aspects related to the implementation of a Digital Signal
Processor (DSP) based Sinusoidal Pulse Width Modulation
(SPWM) for single phase inverter.
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This paper presents theoretical and experimental
aspects related to the implementation of a Digital Signal
Processor (DSP) based Sinusoidal Pulse Width Modulation
(SPWM) for single phase inverter.
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This paper presents theoretical and experimental
aspects related to the implementation of a Digital Signal
Processor (DSP) based Sinusoidal Pulse Width Modulation
(SPWM) for single phase inverter.
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信号发生器是指产生所需参数的电测试信号的仪器。按信号波形可分为正弦信号、函数(波形)信号、脉冲信号和随机信号发生器等四大类。信号发生器又称信号源或振荡器。各种波形曲线均可以用三角函数方程式来表示。能够产生多种波形,如三角波、锯齿波、矩形波(含方波)、正弦波的电路被称为函数信号发生器。-Signal generator is to generate the required parameters of the electrical test signal equipment. Sinusoida
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此程序为用MATLAB产生一个周期性的脉冲正弦信号-This procedure is to use MATLAB to generate a periodic sinusoidal signal pulse
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硬件电路主要分为信号转换电路、分频电路、数据选择电路、单片机系统和显示电路五部分。
电平转换电路:
电平转换电路的必要性:因为在单片机计数中只能对脉冲波进行计数,而实际中需要测量的频率的信号是多种多样的,有脉冲波,还有可能有正弦波、三角波等,所以需要一个电路把待测信号可以进行计数的脉冲波。
通过电平转化电路将正弦输入信号fx整形成同频率方波fo,要将正弦信号转换成方波信号可以用过零比较电路实现。正弦信号通过LM833N与零电平比较,电压大于零的时候输出LM833N的正电源+5V
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画出矩形脉冲波形,并对其进行调制,载波为正弦信号,并画出任意延时后的波形-Draw the rectangular pulse waveform, and its modulation, Carrier is a sinusoidal signal, and to draw an arbitrary delay the waveform after
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上传一个将正弦函数通过Delta-Sigma调节器转换成正负一的脉冲信号。并分别激励同一系统,得到良好的一致输出-Upload a sinusoidal function by Delta-Sigma modulator converts a signal of positive and negative pulse. And separately driven in the same system, to obtain a good coincidence output
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