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公开(公告)号：US4158808A
公开(公告)日：1979-06-19
申请号：US825745
申请日：1977-08-18
CPC分类号： G01R21/00
摘要： A high power source load simulator presents itself to a power meter as a conventional electrical load, but in fact is highly portable and dissipates relatively little power and heat. A current source generates a selectively variable current signal which is characterized by a relatively low, constant voltage. A voltage source generates a selectively variable voltage signal which is phase locked with the current signal and is characterized by a relatively low, constant current. The phase angle between the two signals is selectively variable by means of a phase shift network interposed mediate the voltage and current sources. The current and voltage signals are impressed upon the current and voltage sensing inputs of a power monitor via jumper cables. An AGC circuit is also interposed between the voltage and current sources to insure the amplitude independence of their respective signals.
摘要翻译： 高功率负载模拟器将其自身作为常规电气负载的功率计，但实际上是高度便携式的并且耗散相对较小的功率和热量。 电流源产生一个选择性可变电流信号，其特征在于相对低的恒定电压。 电压源产生与电流信号锁相的选择性可变电压信号，其特征在于相对低的恒定电流。 两个信号之间的相位角可以通过插入介质电压和电流源的相移网络来选择性地变化。 电流和电压信号通过跳线电缆施加到电源监视器的电流和电压检测输入端。 AGC电路也插在电压源和电流源之间，以确保其相应信号的幅度独立性。
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公开(公告)号：US4193039A
公开(公告)日：1980-03-11
申请号：US876918
申请日：1978-02-10
申请人： Richard L. Massa , Kenneth J. Cook
发明人： Richard L. Massa , Kenneth J. Cook
CPC分类号： G06J1/00 , G01D3/06 , H03M1/1295
摘要： An electronic apparatus for automatically zeroing or nulling an analog offset voltage by using multiple bit successive approximation to generate an analog zeroing voltage of equal magnitude and opposite polarity to that of the offset voltage, and then summing the zeroing voltage with the offset voltage.
摘要翻译： 一种电子设备，用于通过使用多位逐次近似来自动归零或归零模拟偏移电压，以产生与偏移电压相等的极性相反的模拟归零电压，然后将归零电压与偏移电压相加。
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