Hybrid-mode laser drive circuit and optical emitting system

A hybrid-mode laser drive circuit, at least comprising:

• a pre-drive unit, configured to receive an input signal and obtain a pre-drive signal according to the input signal, wherein the pre-drive signal and the input signal have opposite phases;
• and
• a drive unit, configured to receive the input signal and the pre-drive signal, wherein the pre-drive signal is used for controlling the input signal to be output in a push-pull manner;
• wherein the drive unit comprises a third NMOS transistor, a fourth NMOS transistor, a fifth NMOS transistor, a sixth NMOS transistor, a seventh NMOS transistor, an eighth NMOS transistor, and a second current source;
• the third NMOS transistor and the fourth NMOS transistor form a differential pair;
• sources of the third NMOS transistor and the fourth NMOS transistor are interconnected and then connected to a negative electrode of a second reference power supply through the second current source;
• a gate of the third NMOS transistor is connected to a positive-phase input signal, and a drain of the third NMOS transistor is connected to a source of the fifth NMOS transistor;
• a gate of the fifth NMOS transistor is connected to a reference voltage, and a drain of the fifth NMOS transistor is connected to a source of the seventh NMOS transistor;
• a gate of the seventh NMOS transistor is connected to a negative-phase pre-drive signal, and a drain of the seventh NMOS transistor is connected to a positive electrode of the second reference power supply;
• a gate of the fourth NMOS transistor is connected to a negative-phase input signal, and a drain of the fourth NMOS transistor is connected to a source of the sixth NMOS transistor;
• a gate of the sixth NMOS transistor is connected to the reference voltage, and a drain of the sixth NMOS transistor is connected to a source of the eighth NMOS transistor;
• a gate of the eighth NMOS transistor is connected to a positive-phase pre-drive signal, and a drain of the eighth NMOS transistor is connected to the positive electrode of the second reference power supply;
• a connection end of the drain of the sixth NMOS transistor and the source of the eighth NMOS transistor is used as an output end of the drive unit.