export chm,good tools

基于可编程跨导运算放大器POTA低通有源滤波器设计。该文给出了基于可编程跨导运算放大器(POTA)的有源滤波器设计方法，能在一定范围内实现跨导值程控调节, 提高调节精度和准确度。并且利用Jacobi 法求解相似对角形矩阵，避免解高次方程的难题。所设计的有源滤波电路不易受分布电容的影响，稳定性好、灵敏度低。本文给出了设计实例，显示了该方法的优点。-Based on programmable transconductance operational amplifier POTA low-pass active filter design. In this paper, based on the programmable transconductance amplifier (POTA) of the active filter design method that can realize in a certain range transconductance value of program-controlled adjustment, improve precision and accuracy regulation. Jacobi method and use a similar matrix of angular, high-equation solution to avoid problems. Designed active filter circuit less susceptible to the effects of distributed capacitance, good stability, low sensitivity. In this paper, design examples, showing the advantages of the method.

重载==运算的例子-example ==

使用C编写递归程序-prepared using recursive procedure C

soap服务实例，通过此实例能初步了解php的soap服务，大家可在此基础上修改-soap service instance, through this instance can be a preliminary understanding of php" s soap service, we can be modified on this basis,

LABVIEW中字符串，簇，数组等功能的使用例子-LABVIEW in strings, clusters, an array of features such as the use of examples

完美國際外掛完美國際外掛完美國際外掛

韦根感应IC卡读写器原理图,成熟产品,已经用于销售,单片机采用STC89C58RD+,读写模块为RC5-Wiegand sensor IC card reader schematic, mature product, has been used for sales, single-chip microcomputer used STC89C58RD+, Read and write modules for RC5

指针变量往往是说是变量这点到另一个对象 .在一些 C 与指针和其他任务更容易执行编程任务。 A指针变量声明为 如下所示： 类型 * variable_name

对autoboot源代码的分析报告。分析了autoboot的原理、安装和代码的框架结构。-right Autoboot source code analysis. Autoboot analysis of the principle, the installation of the framework and code structure.

这个是我公司，在实际软件测试中所实用的实例，串口在excel中的应用。-This is my company, in the actual software testing in the practical example of serial port in the excel application.