Recording head and recording apparatus using the same
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United States of America Patent
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-
Nov 27, 2007
Grant Date -
Dec 15, 2005
app pub date -
Jun 7, 2005
filing date -
Jun 10, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
A recording head or the like having a voltage generating circuit which does not depend on a voltage fluctuation of a heater driving power source (first power source) is provided. The recording head has: a plurality of heaters connected to a power line VH as a heater driving power source; a power transistor as a switching element for independently driving each heater by supplying a current thereto; and a voltage generating circuit for supplying a voltage for a control signal for controlling the power transistor. The voltage generating circuit has a resistor R1 connected to a grounding potential and an n-type MOS transistor T1 in which a reference voltage V1 which is generated by supplying a constant current from a constant current source I0 to the resistor R1 is inputted to a gate.
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