Printhead having digital circuit and analog circuit, and...

Details Printhead having digital circuit and analog circuit, and... Printhead having digital circuit and analog circuit, and...

2006-11-07

2006-11-07

Tran, Douglas Q. (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Plural marking means

C347S017000, C347S019000, C347S005000, C347S009000

Reexamination Certificate

active

07133153

ABSTRACT:
In a printhead having an element substrate on which a digital circuit including a printing element and a drive circuit for driving the printing element in accordance with input print data, and an analog circuit including a detection circuit for obtaining information, a voltage generation circuit for generating the voltage for driving the analog circuit when the value of the voltage for driving the digital circuit is different from that of the analog circuit is arranged on the element substrate, and when the voltage for driving the digital circuit is actually different from that of the analog circuit, only the voltage for driving the digital circuit is externally supplied except a power supply voltage for the printing element, thereby simplifying the overall arrangement.

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