REFERENCE VOLTAGE GENERATING CIRCUIT, SEMICONDUCTOR DEVICE INCLUDING THE SAME AND METHOD OF GENERATING REFERENCE VOLTAGE

摘要

A reference voltage generating circuit, a semiconductor device including the same and a method of generating a reference voltage are provided to reduce error rate in reading logic levels of plural data signals, by providing each reference voltage varying according to each termination voltage of data signals. A plurality of termination nodes provides termination voltages to terminate a plurality of data signals through termination resistors. A plurality of reference voltage generators(120) is connected to the plurality of termination nodes, and generates reference voltages varying according to each termination voltage in order to judge logic levels of the terminated data signals. The reference voltage generation circuit further includes a first voltage node providing a first voltage varying according to a logic low level of the data signals. The first voltage is provided on the basis of a driving ground voltage connected to pull-down voltage drivers of a transmitter(320) outputting the data signals.