Combined output driver

A combined output driver for transmitting video signals, comprising:

• a first output driver outputting a first differential signal to a first external input unit through a pair of signal lines according to first input signals;
• and
• a second output driver outputting a second differential signal to a second external input unit through the pair of signal lines according to second input signals, the second output driver comprising:
• a driver buffer comprising first and second power terminals coupled to a first voltage and a first node respectively, to generate two control signals according to the second input signals;
• an output unit coupled between the first node and a first power rail, generating the second differential signal according to the two control signals;
• and
• a power supply selectively providing the first voltage and a second voltage exceeding the first voltage to the first node, such that the first and second power terminals of the driving buffer are coupled to the first voltage in a first mode and of which are coupled to the first and second voltages respectively in a second mode.

An output driver for transmitting video signals, comprising:

• a driver buffer comprising first and second power terminals coupled to a first voltage and a first node respectively, to generate two control signals according to first input signals;
• an output unit coupled between the first node and a first power rail to output a first differential signal to a first external input unit through a pair of signal lines according to the two control signals;
• and
• a power supply selectively providing the first voltage and a second voltage exceeding the first voltage to the first node, such that the first and second power terminals of the driving buffer are coupled to the first voltage in a first mode and of which are coupled to the first and second voltages respectively and the output unit is disabled to stop outputting the first differential signal in a second mode.