Image forming apparatus and image reading device for use in the apparatus

摘要

An image forming apparatus for forming an image on a recording material comprises a first spreading clock generator for spreading a band of a reference clock that is synchronized with a predetermined frequency, and generating first spreading clock signals; a first control circuit for controlling the image forming apparatus or each section of the image forming apparatus, and which is driven by the first spreading clocks; a second control circuit for controlling the image forming apparatus or each section of the image forming apparatus; a communication line through which a data communication is conduced between the first control circuit and the second control circuit; and a temporary memory section provided in the communication line for temporarily storing communicated data.