Electronic digital logic circuitry – Interface – Current driving
Reexamination Certificate
2006-03-28
2008-07-29
Barnie, Rexford (Department: 2819)
Electronic digital logic circuitry
Interface
Current driving
C326S068000, C326S081000, C326S086000, C327S109000, C327S333000
Reexamination Certificate
active
07405596
ABSTRACT:
A driver circuit is improved in drive capability corresponding to a resolution increase for a CCD sensor while suppressing chip size of a driver circuit. A preceding-stage circuit, operating on VDD2(>VDD) and VLOW2 (<VLOW), is provided in a stage preceding an output-stage circuit operating on VDDand VLOW. The output-stage has a transistor QPd that turns on when supplied with a gate voltage VLOW2from the preceding-stage circuit, thus outputting, onto an output terminal Vout, a voltage VDDand a current according to a voltage Vgs (=VDD−VLOW2). In addition, a transistor QNd turns on when supplied with a gate voltage VDD2from the preceding-stage circuit, thus outputting, onto an output terminal Vout, a voltage VLOWand a current according to a voltage Vgs (=VDD2−VLOW). Because these Vgs are greater than VDD−VLOW, the output-stage circuit can be improved in drive capability and transistor size be correspondingly suppressed.
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Crawford Jason M
Oliff & Berridg,e PLC
Sanyo Electric Co,. Ltd.
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