Recording head and recording apparatus and method of manufacturing same
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United States of America Patent
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-
Dec 15, 1998
Grant Date -
N/A
app pub date -
Mar 7, 1996
filing date -
Mar 7, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The occupied area of a heater drive circuit of a recording head is reduced, and the number of manufacturing steps is decreased. As a circuitry of the heater drive unit, the final stage of the drive unit is constituted of a pnp or npn bipolar transistor, the heater, which is a load, is connected to the emitter side, and the collectors of each transistor are connected commonly to the base itself and grounded. The prestage of the drive unit is formed of the prestage of a MOS type element whose polarities are reversed to those of the final stage, i.e., an n-type MOS transistor with respect to the final stage of a pnp bipolar transistor and a p-type MOS transistor with respect to the final stage of a npn bipolar transistor, and the source of the prestage is grounded.
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