Speed ​​determination device speed determination method, and speed decision circuit

摘要

PPROBLEM TO BE SOLVED: To provide: a speed determining method which determines a transmission speed faster than a conventional art; a speed determining circuit; and a speed determining device. PSOLUTION: The speed determining device comprises: delay elements 2, 3 for generating two signals having a delay difference equivalent to an integral multiple of a pattern cycle of a preamble signal included in an input signal into an input terminal 1; a coincidence detector 4 for comparing logics of the two signals outputted from the delay elements 2, 3; an integration circuit 6 for integrating an output signal of the coincidence detector 4; and a comparator 7 for comparing a signal obtained by the integration circuit 6 with a threshold value Vref to output a determination result. PCOPYRIGHT: (C)2009,JPO&INPIT