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US 5,309,463 AGranted
Laser driving circuit
AssigneeAsahi Kogaku Kogyo Kabushiki Kaisha
InventorToshio Kasai
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AssigneeAsahi Kogaku Kogyo Kabushiki Kaisha
InventorToshio Kasai
Estimating the term…
A laser driving circuit is provided for driving a laser diode, in which the intensity of the laser beam emitted by the laser diode depends upon the amount of electrical current flowing through the laser diode. The laser driving circuit includes a current source for generating an electrical current to flow through the laser diode, the electrical current being varied in accordance with the voltage applied to the current source. In the laser driving circuit, voltage is applied to the current source in accordance with the intensity of the laser beam emitted by the laser diode. A variable resistor member is further provided for varying the voltage applied to the current source and at least one fixed resistor member is selectively connected in parallel with the variable resistor member for dividing the voltage, varied by the variable resistor member, at a predetermined ratio.
A laser driving circuit for driving a laser diode, an intensity of a laser beam emitted by said laser diode depending upon en electrical current flowing through said laser diode, said laser driving circuit comprising:
A laser driving circuit for driving a laser diode, an intensity of a laser beam emitted by said laser diode depending upon an amount of electrical current flowing through said laser diode, said laser driving circuit comprising:
Dependencies are inferred from the claim text.