Semiconductor laser driving circuit

Details Semiconductor laser driving circuit Semiconductor laser driving circuit

1996-01-03

1997-08-26

Scott, Jr., Leon

Coherent light generators

Particular component circuitry

Optical pumping

H01S 300

Patent

active

056617399

ABSTRACT:
When a laser turn-on signal LS of "H" level is input to an input terminal at a time t0 to form an image, at the time t0 the positive input terminal of an operational amplifier is instantaneously supplied with a reference voltage Vk which is switched to "0.7 V", so that the output voltage Vb of the operational amplifier is increased and first and second transistors are set to a conduction state. At time t0, the supply of the driving current I to the semiconductor laser is started and the laser intensity of the laser beam increases and reaches an image-formable laser intensity at a time t2.

REFERENCES:
patent: 4009385 (1977-02-01), Sell
patent: 4771431 (1988-09-01), Nakazawa et al.
patent: 4819241 (1989-04-01), Nagano
patent: 4856011 (1989-08-01), Shimada et al.
patent: 5123023 (1992-06-01), Santarelli et al.

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