An apparatus comprising a circuit configured to determine whether a data sequence comprises a pre-defined data pattern, regulate an output current based on the pre-defined data pattern, and feed the output current to a transmitter configured to transmit a bitstream comprising the data sequence. Also an apparatus for data transmission comprising a transmitter configured to transmit a bitstream comprising a number of consecutive identical digits (CIDs), and a driver coupled to the transmitter and configured to regulate an output current based on the CIDs to stabilize an output voltage, and feed the output current and output voltage to the transmitter.