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2. 发明授权

US4547724A Method and apparatus for detection of non-linear electrical devices 失效
标题翻译：用于检测非线性电气装置的方法和装置
公开(公告)号：US4547724A
公开(公告)日：1985-10-15
申请号：US464796
申请日：1983-02-07
申请人： Todd M. Beazley , Calvin D. Diller
发明人： Todd M. Beazley , Calvin D. Diller
IPC分类号： G01R27/02 , G01R27/14 , G01R27/00
CPC分类号： G01R27/02 , G01R27/14
摘要： The present invention provides a system for applying a fixed level D.C. voltage and a square wave signal sequentially to a voltage divider including a resistor of a known impedance and the device under test. The square wave ranges from a value which is substantially equal to the ground level to a level that is substantially twice the nominal value of the fixed D.C. level, thus the average value of the square wave signal is substantially equal to the nominal value of the fixed level D.C. voltage.With each of these signals applied on at a time to the voltage divider, the voltage across the device under test is applied to a voltage detector via a low pass filter. The output of the low pass filter for each applied voltage signal is the average of the voltage signal which appears across the device under test. The value of these average voltages are stored and then compared. If the average values are substantially equal, then the device under test is linear, and knowing the average voltage value, the nominal voltage value, and value of the known resistor, the resistance value of the device under test can be calculated. If the average values of the voltages across the device under test varies from the application of the fixed level D.C. voltage and the square wave signal, the device under test is non-linear, e.g. a diode or transistor junction.
摘要翻译：本发明提供了一种用于将固定电平直流电压和方波信号顺序地施加到包括已知阻抗的电阻器的分压器和被测器件的系统。方波的范围从实质上等于地电平的值到基本上是固定DC电平的额定值的两倍的电平，因此方波信号的平均值基本上等于固定的DC电平的标称值级直流电压。将这些信号中的每一个同时施加到分压器，将被测器件上的电压通过低通滤波器施加到电压检测器。每个施加的电压信号的低通滤波器的输出是出现在被测器件上的电压信号的平均值。这些平均电压的值被存储然后进行比较。如果平均值基本相等，则被测器件是线性的，并且知道已知电阻器的平均电压值，额定电压值和值，可以计算被测器件的电阻值。如果被测器件上的电压的平均值与固定电平直流电压和方波信号的应用不同，则被测器件是非线性的。二极管或晶体管结。

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