Patent ID: 7224194
Filing Date: 2007-05-29
Classification: H03K

Abstract:
1. An output driver circuit comprising: a pull-up driver adapted to output a supply voltage to an output terminal; a pull-down driver adapted to output a ground voltage to the output terminal; a first pull-up pre-driver adapted to be enabled in response to a data input signal, and to pull up, in an enable state thereof, a gate of the pull-up driver to a level of the supply voltage, using a first charge current controlled by a first current supplied from a current supply unit; a first pull-down pre-driver adapted to be enabled in response to the data input signal, and to pull down, in an enable state thereof, the gate of the pull-up driver to a level of the ground voltage, using a first discharge current controlled by a second current supplied from the current supply unit; a second pull-up pre-driver adapted to be enabled in response to the data input signal, and to pull up, in an enable state thereof, a gate of the pull-down driver to the level of the supply voltage, using a second charge current controlled by the first current; and a second pull-down pre-driver adapted to be enabled in response to the data input signal, and to pull down, in an enable state thereof, the gate of the pull-down driver to the level of the ground voltage, using a second discharge current controlled by the second current.