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A new design of an offset correction system that employs a time varying resistance as a probe for detecting the sign and magnitude of the equivalent input offset of an operational amplifier in a series-shunt feedback configuration is proposed. The time varying sense resistor is implemented by a MOS for which the problem of charge injection is considerably reduced by resorting to a proper discrete...
To improve the accuracy of the GTEM cell applied in radiated EMI measurement, an EMI noise extraction model and the error compensation method based on variance analysis are proposed. High moments were employed to compare the similarity of the two test curves between the GTEM cell after calibration and the standard test. The experimental results for a PCB using the voltage-driven model show that the...
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