Methods to reduce inductive coupling that occurs on a PCB surface

When a time varying external current passes through a wire a magnetic field is generated which in its turn induce a disturbing voltage in a neighbouring circuit. This can be an undesired effect that affects both circuits. The coupling element is mutual inductance. This paper aims to analyze the effects of inductive coupling determined by the variation of a disturbing electric current. A study of inductive coupling between three circuits and a configuration to reduce its effects will be presented in the paper.