Patent ID: 9106459
Filing Date: 2015-08-11
Classification: H03K,H04L

Abstract:
1. A communication circuit apparatus comprising: a plurality of level shift circuits, each of which receives an input signal corresponding to a respective communication bus; an activation comparator for generating an activation signal when the input signal is input into one of the level shift circuits, and a level of the input signal exceeds a predetermined threshold; a plurality of input current voltage conversion circuits, each of which is arranged together with a respective level shift circuit, converts an input current of the input signal to a voltage signal when the input signal is input into the respective level shift circuit, and outputs the voltage signal as an identification signal; and an identification circuit for identifying one of the communication busses based on the identification signal, which is output from one of the input current voltage conversion circuits, wherein the one of the communication busses corresponds to the one of the level shift circuits, in which the input signal is input.