Circuit for self-calibrated impedance measurement of electrical components and analogue circuits

摘要

A test item (1) connected in series with the circuit is supplied from a signal generator (2) and the resultant current transformed into a voltage. An evaluation circuit (9) determines the item impedance from the voltage. A reference impedance (4) is connected in series with the test item using a switching system (3). Impedance measurements are taken with the test item connected and with the test item bypassed to perform a calibration measurement.