Circuit for resolution matching

摘要

A circuit for matching resolutions of a data transmitted from a host computer and an image forming apparatus, the image forming apparatus including engine unit for printing the data on paper and video controller for synchronizing the data to be printed to a horizontal synchronizing signal and a video clock received from the engine unit and for serially transmitting the data to the engine unit by the one dot, is disclosed. A resolution matching circuit of an image forming apparatus having transverse direction enlargement portion for generating a second video clock by converting the frequency of the video clock received from the engine unit corresponding to the rate of the resolutions and for providing the second video clock to the video controller and longitudinal direction enlargement portion for temporarily storing a data of an odd number scanning and for providing the stored data to the engine unit as a data of a next even number scanning to be scanned.