Constant-current driving pulse excitation light source circuit

The utility model discloses a constant current driving pulse excitation light source circuit which comprises an NPN type triode, a precision voltage reference source and an operational amplifier, the NPN type triode is connected to the positive end input end of the operational amplifier through the precision voltage reference source, a first resistor is arranged between the NPN type triode and the precision voltage reference source, and a second resistor is arranged between the precision voltage reference source and the operational amplifier. A second resistor is arranged between the precision voltage reference source and the positive input end, and the output end of the operational amplifier is connected to the field effect transistor through a fourth resistor. Through the precise voltage reference source, the operational amplifier and the field-effect tube, the light source is excited in a pulse mode, constant current is achieved during excitation, and the service life and stability of the light source are