| 摘要 |
PURPOSE:To realize an image forming device in which countermeasure for noise is improved with inexpensive and compact system constitution and consequently the detecting accuracy of original density is improved. CONSTITUTION:A light receiving sensor S for detecting reflected light from an original, an amplifier 2 which amplifies a weak analog signal being the detection signal of the sensor S to a specified level, an A/D converter 3, and a light receiving sensor unit 1 consisting of a CPU 4, etc., being the center of control are made to one chip to be mounted on a substrate 1a. Communication between the unit 1 and an external control substrate 70 is performed through a digital communication channel 11 and a control signal line 12. |
