SIMULTANEOUS BIDIRECTIONAL INPUT/OUTPUT CIRCUIT FOR IMPROVING DATA INPUT MARGIN

摘要

PURPOSE: A simultaneous bidirectional input/output circuit for improving a data input margin is provided to increase the data input margin and regenerate data by improving a structure of a bidirectional input/output circuit. CONSTITUTION: A simultaneous bidirectional input/output circuit for improving a data input margin includes a bus line(330), an input terminal(310), an output buffer(320), and an input buffer(350). The output buffer(320) is connected between the bus line(330) and the input terminal(310) in order to receive signals from the input terminal and transmit the signals to the bus line. The input buffer(350) is connected between the bus line(330) and the input terminal(310) in order to regenerate input signals by comparing two reference signals of three reference signals having different levels according to states of the signals of the input terminal and the input signals of the outside with the signals of the bus line determined by output signals of the output buffer.