模拟偏置模拟偏置，也称为DC偏置，是一个非常有用的功能，大多数示波器都具有该功能。如果运用得当，可以避免小信号测试时垂直分辨率的丢失的问题。模拟偏置给输入的信号加上一个直流偏置电压，如果输入信号出了示波器ADC的测量范围，加上偏置电压之后，能将信号调节到示波器的范围内。出范围的信号通过模拟偏置将信号调节至示波器的测量范围内典型应用：LVDS1）LVDS信号特征LVDS（低压差分信号），如所示，两组相位相反的差分信号，信号特征如下：峰峰值：350mV共模电压偏置：1.2V高压：1.2V+0.5*350mV=1.375V低压：1.2V+0.5*350mV=1.025V该测的是PicoScope6404B示波器，4通道，500MHz，8位分辨率，信号是仿真的LVDS信号。
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对应于励磁线圈每一恒定的电流，电涡流制动器均表现出一条转矩依附于转速的稳定制动特性曲线，通过改变励磁电流的大小，即可以改变制动力矩。电涡流制动器磁粉制动器磁粉制动器是采用磁粉作介质，在通电情况下形成磁粉链来传递扭矩的*传动元件，由内转子、外转子、激磁线圈及磁粉组成。当线圈不通电时，主动转子旋转，由于离心力的作用，磁粉被甩在主动转子的内壁上，磁粉与从动转子之间没有接触，主动转子空转。接通直流电源后产生电磁场，工作介质磁粉在磁力线作用下形成磁粉链，把内转子、外转子联接起来，从而达到传递、制动扭矩的目的。
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PV063R9L1TNMPCK0
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功率器件热阻分布示意图举个例子来说，大家常用的S8050在25℃（Tc）的耗散功率是0.625W，额定电流为0.5A，结点温度为150℃,此代入公式有：从上面公式可以推算出Rja为200℃/W（Rja表示结点到空气的热阻）。假设芯片壳温（Tc）为55℃，热耗散功率有0.5W时，此刻芯片结点温度为：Tj=Tc+PD*Rjc代入得到155℃，已经过了结温150℃了。故需要降额使用，然而降额曲线在数据手册中并未标注，所以小编只能自行计算。
