A method for stabilizing a recirculating loop of an impedance measuring device

摘要

A method for stabilizing a recirculating loop in an impedance measuring device comprising a first measuring connection for connection to be tested with a device (dut) and a second measuring connection for connection with the test device (dut), a device for applying a measuring voltage to the first measuring connection, a recirculating loop for receiving a current to be tested by the device (dut) flows into the second measuring connection, a device for measuring the transmission behavior of the feedback and a variable phase shifter for setting a total phase shift ω within the feedback, a by the device (dut) flowing current is measured, while the second measuring connection to an electric potential is held in the vicinity of the mass is, with the following process steps:a) measuring the transmission behavior of the recirculating loop for at least three standard impedances z.sub.1, z.sub.1 the between the first and second measuring connection are connected;b) calculating a phase shift amount based on the measurement results for the standard impedances, which is obtained in step a)..