Temperature and aging compensated drive circuit in a semiconduct

Details Temperature and aging compensated drive circuit in a semiconduct Temperature and aging compensated drive circuit in a semiconduct

1986-06-26

1988-08-02

Goldberg, E. A.

Recorders

Printing, dotting, or punching marker

Ink transfer support or moving means

346 76L, 358296, G01D 942

Patent

active

047616598

ABSTRACT:
A drive circuit for a semiconductor laser in a laser printer in which the laser output is sampled and compared with a reference signal. The reference signal is varied to compensate for temperature changes of the entire drive circuit, especially the semiconductor laser. The comparison signal then controls the size of the drive current to the laser. This drive current is modulated by the image data.

REFERENCES:
patent: 4484331 (1984-11-01), Miller
patent: 4612555 (1986-09-01), Hongon et al.
patent: 4612671 (1986-09-01), Giles
patent: 4625315 (1986-11-01), Lemberger et al.

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