Circuit arrangement for time-offset compensation in multi-channel line printers

摘要

In a multi-channel line printer, the printing elements are spatially offset. In order nevertheless to print simultaneous events with the same abscissas, the input signals are digitised by means of an A/D converter (22). The signals in the second and third channels are stored by the memories 300, 302 and are output in a delayed manner. Sampling takes place at twice the mains frequency. However, maximum and minimum values are formed over relatively long intervals which are determined by a programmable frequency divider 122. Only these maximum and minimum values are supplied to the memories 298, 300, 302. Simple hard-wired logic for controlling the sequence is described. <IMAGE>