Characterization of Component Under DC Biasing Condition Using an Inductive Coupling Approach

Based on a two-probe inductive coupling approach, a novel measurement method to characterize the impedance of any passive component (R, L, or C) under a direct-current (dc) biasing condition has been developed. With a premeasurement calibration process, the proposed method has the ability to eliminate errors due to the measurement setup. Using resistors and inductors as devices under test, impedance characterization of a component up to 1 GHz with good accuracy has been demonstrated. The proposed method provides insight of the impedance behavior of a critical circuit component under its intended biasing condition, so that proper choice of a component can be made for a specific biasing condition to achieve optimal circuit performance.