| 摘要 |
A drive circuit that drives a light emitting element coupled to a first output terminal of a differential circuit, the drive circuit includes: a dummy load provided at a second output terminal of the differential circuit, a resistor coupled between the first output terminal and the second output terminal, two transistors coupled to a voltage source and applying a current to the light emitting element and the dummy load, and a comparative amplifying circuit having a non-inverting input terminal coupled to a reference voltage, an inverting input terminal coupled to at least the first output terminal of the differential circuit via a resistor, and an output terminal coupled to gates of the two transistors. |
