Voltage mode transmitter circuit having overvoltage protection

A voltage mode transmitter circuit, comprising:

• a low-dropout (LDO) regulator, generating a driving voltage;
• and
• at least one first output circuit, coupled to a first output pad to generate a first output signal, wherein each of the at least one first output circuit comprises:
• a termination resistor, coupled to the first output pad, and transmitting the first output signal via the first output pad;
• a data processing circuit, driven by the driving voltage, and adjusting a level of a first node according to a first data signal and a second data signal;
• a pre-emphasis circuit, transmitting a supply voltage to the first node according to a control signal to adjust a transition edge of the first output signal;
• and
• a voltage protection circuit, coupled between the termination resistor and the pre-emphasis circuit, providing an overvoltage protection according to a bias voltage, and coupling the first node to the termination resistor;
• wherein, the data processing circuit, the pre-emphasis circuit, and the voltage protection circuit comprise at least one transistor, and a highest level of the first output signal is higher than a withstand voltage of each of the transistors in the data processing circuit, the pre-emphasis circuit and the voltage protection circuit.