Patent ID: 7353009

Claim:
A combined transmitter for transmitting video signals, comprising: a set of input terminal for receiving first data; a first transmission unit, coupled to the set of input terminals, comprising a plurality of first drivers each capable of sending a first differential signal to a first external input unit through a pair of first signal lines, wherein the first external input unit comprises a first resistor coupled between the first signal lines; a second transmission unit, coupled to the first set of input terminals, comprising a plurality of second drivers each capable of sending a second differential signal to a second external input unit through a pair of second signal lines, wherein the second external input unit comprising second resistors each coupled between a power rail in the second external input unit and one of the second signal lines; and a switching controller enabling the first transmission unit to transmit the first data on the set of input terminals or enabling the second transmission unit to transmit the first data on the set of input terminals, according to a mode selection signal.