Quenching the conducted emission hazards for heliborne time domain electromagnetic exploration system

Noise limits set by regulatory agencies make solutions to common mode EMI a necessary consideration in the manufacture and use of electronic equipment. Common mode filters are generally relied upon to suppress line conducted common mode interference. These filters successfully and reliably reduce common mode noise. However, successful design of common mode filters requires foresight into the non ideal character of filter components - the inductor in particular. It is the aim of this paper to provide filter designers the knowledge required to identify those characteristics critical to desired filter performance.