Active solid-state devices (e.g. – transistors – solid-state diode – Incoherent light emitter structure – In combination with or also constituting light responsive...
Patent
1993-12-27
1995-05-09
Mintel, William
Active solid-state devices (e.g., transistors, solid-state diode
Incoherent light emitter structure
In combination with or also constituting light responsive...
257 82, 257 84, 257467, 257921, 372 24, 372 29, 372 31, 372109, 372514, H01L 3300
Patent
active
054142806
ABSTRACT:
A laser control circuit in which the laser is driven by a voltage controlled, current driver. At the beginning of each scan, an outer loop senses the laser power, and compares it at an outer loop summing junction to a predetermined value to generate a correction, and then applies that correction to the current driver through an inner summing junction. Within each scan, an inner loop detects the voltage across the laser and applies it as a correction voltage to the inner loop summing junction. The result is that at the beginning of each scan the laser power is set, and during the scan the voltage across the laser is held constant.
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patent: 5025447 (1991-06-01), Ohashi
patent: 5123023 (1992-06-01), Santerelli et al.
patent: 5237858 (1993-08-01), Horikiri et al.
patent: 5268914 (1993-12-01), Yamamuro et al.
Cunha Robert
Mintel William
Xerox Corporation
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