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单片机编程 基于89C52的二极管特性测试器的设计
利用单片机具有的智能程序控制的特点，设计了基于STC89C52单片机的"二极管特性测试器"，可对二极管一般特性进行快速测试。通过稳定线性电流源给二极管加载恒定电流，然后由高精度模数转换器测试其压降，以此为基础可判断二极管好坏、检测二极管极性和测试二极管伏安特性等，避免了用万用表测试只能测得极性而不知其特 ...
单片机编程 基于DAC7512的数控直流恒流源设计
为了解决磁放大器性能测试过程中，需要对其供给不同数值恒定电流的问题，设计了一种基于DAC7512和单片机的数控恒流源系统。该系统采用AT89C51作为主控器件，将计算机发送的电流控制字命令转换为D/A转换器控制字，通过模拟SPI通信接口，写D/A控制字到DAC7512，从而控制其输出相应数字电压值，经差动缩放电路、电压/电路变换 ...
可编程逻辑 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 ...
可编程逻辑 磁芯电感器的谐波失真分析
磁芯电感器的谐波失真分析 摘  要：简述了改进铁氧体软磁材料比损耗系数和磁滞常数ηB，从而降低总谐波失真THD的历史过程，分析了诸多因数对谐波测量的影响，提出了磁心性能的调控方向。 关键词：比损耗系数， 磁滞常数ηB ，直流偏置特性DC-Bias，总谐波失真THD  Analysis on THD of the fer rite co res u ...
测试测量 基于Multisim 10的矩形波信号发生器仿真与实现
在Multisim 10软件环境下，设计一种由运算放大器构成的精确可控矩形波信号发生器，结合系统电路原理图重点阐述了各参数指标的实现与测试方法。通过改变RC电路的电容充、放电路径和时间常数实现了占空比和频率的调节，通过多路开关投入不同数值的电容实现了频段的调节，通过电压取样和同相放大电路实现了输出电压幅值的调节 ...
单片机开发 yright 2002 Cygnal Integrated Products, Inc. // // Filename: LIION_BC_MAIN.c // Target Device: 8051F
yright 2002 Cygnal Integrated Products, Inc. // // Filename: LIION_BC_MAIN.c // Target Device: 8051F300 // Created: 11 SEP 2002 // Created By: DKC // Tool chain: KEIL Eval C51 // // This is a stand alone battery charger for a Lithium ION battery. // It utilizes a buck converter, controlled by the on ...
其他嵌入式/单片机内容 he LPC932 can be used to create a Pulse Width Modulated PWM signal. That s an analog signal, with on
he LPC932 can be used to create a Pulse Width Modulated PWM signal. That s an analog signal, with only 2 discrete levels, for example 0V and 5V and a constant period. The current value of this signal at a certain poiTnt of time is proportional to its Duty Cycle. That s the High Time during one perio ...
Java编程 One-channel queuing system simulator (M/M/1) * Arrival and service times are random and distributed
One-channel queuing system simulator (M/M/1)
* Arrival and service times are random and distributed exponetially.
*
* The simulator is time-slice-driven, i.e. the system model is being
* run at discrete time points, with constant increments deltaT.
* At each such time moment, program checks if a n ...
加密解密 C# BigInteger class. BigInteger.cs is a csharp program. It is the BIgInteger class. It has methods:
C# BigInteger class. BigInteger.cs is a csharp program. It is the BIgInteger class. It has methods: abs() , FermatLittleTest(int confidence) ,gcd(BigInteger bi) , genCoPrime(int bits, Random rand) , genPseudoPrime(int bits, int confidence, Random rand) , genRandomBits(int bits, Random rand) , isProb ...
matlab例程 Calculates photonic band structure for either an fcc or diamond lattice of dielectric spheres of die
Calculates photonic band structure for either an fcc or diamond lattice of dielectric spheres of dielectric constant epsilon_a in a dielectric background of dielectric constant epsilon_b.