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模拟电子 交流电压，电流转换器
交流电压，电流转换器 特点： 精确度0.25%满刻度(RMS) 多种输入,输出选择 输入与输出绝缘耐压2仟伏特/1分钟 冲击电压测试5仟伏特(1.2x50us) (IEC255-4,ANSI C37.90a/1974) 突波电压测试2.5仟伏特(0.25ms/1MHz) (IEC255-4) 尺寸小，稳定性高 2:主要规格 精确度:0.25%F.S.(RMS) (23 &plusmn;5℃) 输入负载: <0.2VA(voltage) < ...
模拟电子 为什么我的CMOS逻辑电路烧起来了
Abstract: What can be simpler than designing with CMOS and BiCMOS? These technologies are very easy to use butthey still require careful design. This tutorial discusses the odd case of circuits that seem to work but exhibit somepeculiar behaviors&mdash;including burning the designer&#39;s fingers! ...
模拟电子 Delta Sigma的ADC桥测量技术
&nbsp;
Sensors for pressure, load, temperature, acceleration andmany other physical quantities often take the form of aWheatstone bridge. These sensors can be extremely linearand stable over time and temperature. However, mostthings in nature are only linear if you don&rsquo;t bend them toomuch. ...
模拟电子 DAC技术用语 (D/A Converters Defini
Differential Nonlinearity: Ideally, any two adjacent digitalcodes correspond to output analog voltages that are exactlyone LSB apart. Differential non-linearity is a measure of theworst case deviation from the ideal 1 LSB step. For example,a DAC with a 1.5 LSB output change for a 1 LSB digital codec ...
PCB相关 计算FR4上的差分阻抗(PDF)
Calculation of the Differential Impedance of Tracks on FR4 substrates
There is a discrepancy between calculated and measured values of impedance for differential transmission lineson FR4. This is especially noticeable in the case of surface microstrip configurations. The anomaly is shown tobe due to ...
电源技术 交流瓦特/瓦特小时，乏尔/乏尔小时转换器
交流瓦特/瓦特小时，乏尔/乏尔小时转换器 特点： 精确度0.25%满刻度 多种输入,输出选择 输入与输出绝缘耐压2仟伏特/1分钟 冲击电压测试5仟伏特(1.2x50us) 突波电压测试2.5仟伏特(0.25ms/1MHz) (IEC255-4) 尺寸小，稳定性高 主要规格： 精确度: 0.25% F.S. (23 &plusmn;5℃) 输入负载: <0.2VA (Voltage) <0.2VA (Current) ...
电源技术 电源调整与虚拟地
Abstract: Rail splitting is creating an artificial virtual ground as a reference voltage. It is used to set the signalto match the op amp&#39;s "sweet spot." An op amp has the most linear- and distortion-free qualities at that sweetspot. Typically, the sweet spot occurs near the center between the ...
电源技术 使用新电源模块改进表面贴装可制造性
The latest generation of Texas Instruments (TI) boardmountedpower modules utilizes a pin interconnect technologythat improves surface-mount manufacturability.These modules are produced as a double-sided surfacemount(DSSMT) subassembly, yielding a case-less constructionwith subcomponents located on b ...
单片机编程 LCD12864显示汉字和数字(程序和电路）
附件为：LCD12864显示汉字和数字的程序与电路
/*
&nbsp;自定义延时子函数
*/
void delayms(uchar z)
{
&nbsp; int x,y;
&nbsp; for(x=z;x>0;x--)
&nbsp;&nbsp;&nbsp;&nbsp; for(y=110;y>0;y--);
}
/*
&nbsp;&nbsp;&nbsp;&nbsp; 判断LCD忙信号状态
*/
void buys()
{
&nbsp; int dat;
&nbsp; RW=1;
&nbsp; ...
单片机编程 C51中的关键字及用途说明
C51 中的关键字关键字 用途 说明auto 存储种类说明 用以说明局部变量，缺省值为此break 程序语句 退出最内层循环case 程序语句 Switch 语句中的选择项char 数据类型说明 单字节整型数或字符型数据const 存储类型说明 在程序执行过程中不可更改的常量值continue 程序语句 转向下一次循环default 程序语句 Switch 语句中的失 ...