Multiple diode imaging system including a multiple channel beam modulation integrated circuit

This invention relates generally to a multiple-diode raster output scanning system. The system directs high intensity imaging beams toward a reflective scanning element, causing the beams to scan across a movable photoresponsive member and record latent electrostatic images thereon. More particularly, the invention relates to the use of a multi-channel integrated circuit for control of laser beams and, in turn, the exposure of the photoresponsive surface. The present invention is an apparatus for digitally controlling the output of multiple laser diodes in a system that forms a plurality of scan lines in a Raster Output Scanning (ROS) system. Output of the laser diodes is digitally controlled by a multi-channel integrated circuit to eliminate propagation delay and linearity differences commonly found between single-channel modulation control devices.