| 摘要 |
<p>A drive circuit is disclosed for repetitively energising a print head 10 to eject drops of ink. The print head 10 has multiple nozzle channels each having a respective capacitance Cn1, Cn2 etc, with the print head having its own inherent capacitance Cn0. A print head drive terminal 30 connects the nozzle channels to a first power supply connection 40 from the pulse generation circuit 20, while the nozzle channels are connected by a return path 50 to a second power supply connection 60. Each nozzle is connected in series with a respective switching element Sn1, Sn2 etc. controlled by a print data source 70 and a timing data source 80. The drive circuit comprises a control arrangement 90 to drive wave forms for switching elements S1, S2 etc in the pulse generation circuit 20. The timing is processed by a timer generator 100.</p> |
