Patent ID: 6665804
Filing Date: 2003-12-16
Classification: G06F,H04L

Abstract:
A data transmission system including a first device and a second device communicating with each other by electromagnetic induction,wherein said first device comprises a preparing circuit that prepares a data having a voltage defined related to a first threshold; and a transmitting circuit that transmits said data prepared by said preparing circuit, wherein said second device comprises a receiving circuit that receives said data from said transmitting circuit; a bias circuit that raises said voltage of said received data by a predetermined voltage to produce a sum voltage; and a judging circuit that judges whether said voltage of said data indicates high or low by comparing said sum voltage with a second threshold that is equal to or larger than said first threshold, wherein said receiving circuit includes a coil that produces an electromotive force upon receiving said data from said transmitting circuit, and wherein said bias circuit includes a diode that is connected to said coil in series to increase said electromotive force by a forward voltage of said diode.