DATA DISTRIBUTION IN MONOLITHIC PRINT HEADS

摘要

An apparatus with a reduced number of transistor required for shift registers and drive circuitry in printing heads with multiple print actuators and drive circuitry integrated on a single silicon chip than would otherwise be required. The apparatus is relevant to print heads where the data driven to the print head actuators is required to be valid for longer than the duration of the shift register clock. The main purpose of the apparatus is to eliminate the parallel loaded holding registers that would normally be required in this circumstance. The apparatus achieves this by using a two phase gated clock generator for each group of actuators in conjunction with a dynamic shift register, each stage of which includes gated feedback from its corresponding driver stage to hold data valid during the period that the print actuator is enabled.