Generalized Cancellation of Capacitor Parasitic Inductance Using a Lattice Network and Its Application to Common-Mode Noise Reduction

Abstract

This letter presents a generalized technique for cancelling the parasitic inductance of capacitors using a lattice network. The Z-matrix-based equivalent transformation shows that the conventional vertically symmetric inductance condition is only a sufficient condition and can be relaxed. A vertically asymmetric lattice network is then proposed, enabling the parasitic inductance of capacitors to be cancelled by adjusting only one inductance. The method is further extended to common-mode noise reduction using a common-mode choke, and both concepts are experimentally verified.