Patent ID: 8259766
Filing Date: 2012-09-04
Classification: H01S,H03K

Abstract:
1. A laser diode drive circuit comprising: a duty control amplifier that controls a duty ratio of a main signal for laser control in accordance with a duty control signal; a logic circuit which includes an input of the duty control signal and a shutdown signal, but does not include an input of said main signal; said logic circuit outputs the duty control signal to the duty control amplifier, and outputs the duty control signal that controls the duty ratio of the main signal to be 0% in the duty control amplifier in accordance with the shutdown signal being activated, of a laser diode; wherein the duty control signal is an analog signal, wherein an output of said logic circuit is a first input of said duty control amplifier, wherein said main signal is a second input of said duty control amplifier, and wherein said logic circuit is an AND gate.