FLUID EJECTION DEVICE WITH FEEDBACK CIRCUIT

摘要

A fluid ejection device includes a plurality of fluid ejecting elements (130/230), each fluid ejecting element controllable to conduct electrical current between a supply voltage (120/220/320) and a reference voltage (122/222/322). Up to all fluid ejecting elements of a group (276) of the plurality of fluid ejecting elements are configured to conduct during a time period. Each conducting fluid ejecting element has a corresponding fluid ejecting voltage when conducting. A feedback circuit (118/218) is configured to provide a feedback voltage (144/244/344) substantially equal to an average of corresponding fluid ejecting voltages at the fluid ejecting elements that are conducting.