Power line arrangement

#1. Field

#One or more embodiments described herein relate to power lines.

#2. Background

#The embodiments will be described in detail with reference to the following drawings in which like reference numerals refer to like elements wherein:

#FIG. 1 is a diagram of one embodiment of a power line arrangement.

#FIG. 2 is a conceptual diagram illustrating a principle of noise reduction that may be achieved in the power line arrangement of FIG. 1.

#FIG. 1 shows one embodiment of a power line 10 having two ends 11 and 14. From end 11, a pair of power lines 12 and 13 branch off and extend in different (e.g., opposing) directions. Power lines 12 and 13 may have one or more common properties, e.g., resistance. As further shown in FIG. 1, at least one cross area A is formed between power lines 12 and 13. The directions in which current flows in the power lines may be different. This may be accomplished by aligning the power lines in a manner which allows the different current directions to be formed at the cross area. Also, power lines 12 and 13 may be aligned in two or three dimensions so as to form opposing current directions at the cross area.

#At cross area A, the power lines may have a chain or twist shape but they do not necessarily contact each other in this area. For example, power lines 12 and 13 branch off from end 11, meet at cross area A, and extend away again to escape the cross area A. At the other end 14, the two power lines meet and are coupled, for example, to a power input of an electronic device element or are grounded.

#In terms of signal propagation, from end 11 current it is divided into currents i1 and i2 that flow respectively through power lines 12 and 13. In the case where the power lines have a same resistance, the magnitudes of currents i1 and i2 will be equal or at least substantially so. With these currents, the same amount of common-mode noise nc1 and nc2 are generated on power lines 12 and 13.