| 摘要 |
A method for reproducing a time-related direct current, with application of a superposition of two currents and of a current conversion by means of magnetic induction, characterized in that the resulting current consists of the DC current (Ii) and the auxiliary current (Ip), whereas the auxiliary current shape provides the resulting current with cycling around the zero value, and the resulting current is converted by magnetic induction with a linear conversion characteristic into a voltage being in proportion to the time-derivative of the current resulting from the DC current (Ii) and the auxiliary current (Ip), and at the same time, it is converted by non-linear magnetic induction into voltage pulses that occur while changing the direction of the current resulting from the DC current (Ii) and the auxiliary current (Ip), and then those pulses are converted into pin pulses (Is) that occur when the current resulting from the DC current (Ii) and the auxiliary current (Ip) passes zero, whereas the voltage being in proportion to the time-derivative of the current resulting from the DC current (Ii) and the auxiliary current (Ip), is integrated in the integrating circuit (6), and the pin pulses (Is) are fed to the additional input of the integrating circuit (6), and those pin pulses are used for zeroing the integrated voltage when the current resulting from the DC current (Ii) and the auxiliary current (Ip) passes the zero value, and then, from the voltage (U3) obtained at the output of the integrating circuit (6), the voltage (U4) is subtracted, whereas the voltage (U4) is in proportion to the auxiliary current (Ip), and then, the result of the voltage subtraction (U3 - U4) remaining in proportion to the reproduced DC current (I) is amplified thus producing a current signal or voltage signal (Sp).<IMAGE>
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