Data transmission system of directional coupling type using forward wave and reflection wave

摘要

A memory module bus system using a plurality of directional couplers to permit high-density packaging. A wiring line (main line) extending from a main controller and cooperating with a sub coupling line to form a directional coupler is open-ended or short-circuited to ensure that a forward wave and a reflection wave can be used to generate signals in opposite directions of the directional coupler. Memory modules are connected to opposite ends of the sub coupling line. The line length of the coupler can be half the pitch between the memory modules.