Gate drive circuit and signal modulation method thereof

Abstract

A gate driving circuit includes: a signal generating circuit, a pulse width modulation control circuit and a control transistor. The signal generating circuit generates a global emitting signal and a reference emitting signal according to a blanking time length. The pulse width modulation control circuit receives a pulse width modulation data, a sweeping signal, and receives the global emitting signal from the signal generator to provide a local emitting signal. A pulse width of the local emitting signal is less than or equal to a pulse width of the global emitting signal. The control transistor has a first terminal for receiving the reference emitting signal, a control terminal for receiving the local emitting signal, and a second terminal for providing an adjusted emitting signal.

Images