Abstract: A structure and a method for reducing the mutual inductance between two adjacent transmission lines according to the invention. In the invention, an inverse U-shaped transmission line is located on one side of a transmission line. The corner of a first side of the inverse U-shaped transmission line is bond finger for signal input; the corner of a second side of the inverse U-shaped transmission line is connected to via for signal output. To prevent antenna effect, corners of the inverse U-shaped transmission line are mitered. Furthermore, using computer simulation software, the lengths of the first and second sides of the inverse U-shaped transmission line and the pitches between the first and second sides and the selected transmission line can be adjusted to effectively reduce the mutual inductance therebetween. As a result, cross-talk caused by the mutual inductance can also be eliminated.

Abstract: A structure for reducing the mutual inductance between two adjacent transmission lines on a substrate according to the invention includes a loop-shaped transmission line, at least one transmission line located on each side of the loop-shaped transmission line. One end of the loop-shaped transmission line is connected to bond wire and a diagonal end is connected to a signal output on the substrate. The loop-shaped transmission line has a short side equal to ½ of the wavelength of an input signal. With such structure, even though the clock frequency of a used CPU is several hundred MHz, the mutual inductance and cross-talk caused by the mutual inductance can be effectively reduced.