Output driver and output buffer circuit including the same

An output buffer circuit comprising:

• a level shifting circuit configured to generate a pull-up driving signal and a pull-down driving signal based on an input signal;
• and
• an output driver configured to generate an output signal at an output node based on the pull-up driving signal and the pull-down driving signal, wherein the output driver comprises:
• a pull-up driver connected between an output power supply voltage and the output node, and configured to pull up a voltage at the output node based on the pull-up driving signal and a pull-up reference voltage;
• a pull-down driver connected between the output node and a ground voltage, and configured to pull down the voltage at the output node based on the pull-down driving signal and a pull-down reference voltage;
• and
• a reference voltage compensation circuit configured to perform a short operation during transitions of the pull-up driving signal and the pull-down driving signal, wherein the short operation comprises electrically connecting any one or any combination of the pull-up reference voltage to the ground voltage and the pull-down reference voltage to the output power supply voltage.

An output driver comprising:

• a pull-up driving transistor and a pull-up bias transistor connected by a cascode structure between an output power supply voltage and an output node, wherein a gate electrode of the pull-up driving transistor is configured to receive a pull-up driving signal, and a gate electrode of the pull-up bias transistor is configured to receive a pull-up reference voltage;
• a pull-down driving transistor and a pull-down bias transistor connected by a cascode structure between the output node and a ground voltage, wherein a gate electrode of the pull-down driving transistor is configured to receive a pull-down driving signal, and a gate electrode of the pull-down bias transistor is configured to receive a pull-down reference voltage;
• a first reference voltage compensation circuit configured to electrically connect the pull-up reference voltage to the ground voltage during transitions of the pull-down driving signal;
• and
• a second reference voltage compensation circuit configured to electrically connect the pull-down reference voltage to the output power supply voltage during transitions of the pull-up driving signal.