Patent ID: 9263109
Filing Date: 2016-02-16
CPC Classification: G11C

Claim Text:
1. An output driver which outputs an output signal to a transmission line, the output driver comprising: a pre-driver which changes a duty ratio of a first drive signal and a duty ratio of a second drive signal to a plurality of patterns in accordance with a control signal; and a main driver which connects in series a first driver driven by the first drive signal and a second driver driven by the second drive signal and which outputs the output signal to the transmission line from a connection node of the first and second drivers; wherein when a terminator which absorbs the output signal is provided in the transmission line, the pre-driver generates the first and second drive signals that turn off both the first and second drivers in a predetermined period; and wherein when the terminator which absorbs the output signal is not provided in the transmission line, the pre-driver generates the first and second drive signals that weakly turn on both the first and second drivers in a predetermined period.