the input data din is logic value u201c 1 u201d and is in a turned off state when the input data din is logic value u201c 0 u201d similarly the state of the first driver drv 1 is controlled by the input data din such that the first driver drv 1 is in a turned on state when the input data din is logic value u201c 1 u201d and is in a turned off state when the input data din is logic value u201c 0 u201d in view of the above when the logic value of the input data din repeats u201c 0 u201d and u201c 1 u201d the output voltage dout is driven to the high voltage level voh vterm when the input data din is logic value u201c 0 u201d when the input data din is logic value u201c 1 u201d the logic value of the control signals ctrl 1 and ctrl 2 are u201c 1 u201d and u201c 0 u201d respectively so that the output voltage dout is driven to the low voltage level vol vterm u2212 i 1 i 2 rterm due to the turned on state of the first and second drivers drv 1 and drv 2 however the voltage swing of the output data dout is voh vterm u2212 a.