| 摘要 |
An inkjet print head comprising an array of print head heater circuits, each associated with a respective print head nozzle. Each heater circuit comprises a heater arrangement (12) and a drive transistor (10) for driving current through the heater arrangement (12) connected in series between power lines (V<SUB>s</SUB>, GND). The heater arrangement (12) comprises a plurality of diode elements (16) in series. The diode elements have an inherent resistance, to provide the required heating, but the voltage drops across the diode elements enable the voltage across the transistor when in the off condition to be reduced. This enables a reduction in size of the transistor and/or enables a higher supply voltage to be used. |
