Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2011-06-07
2011-06-07
Le, Dinh T. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
C327S538000, C327S535000
Reexamination Certificate
active
07956676
ABSTRACT:
A semiconductor apparatus includes a constant voltage circuit that converts an input voltage and outputs a prescribed constant voltage. The constant voltage circuit includes an output transistor that receives an input of a control signal and outputs a current (from an input terminal to an output terminal) in accordance with the control signal. Also included is an error amplifier circuit that controls the output transistor to create a voltage in proportion to an output voltage outputted from the output terminal becomes a prescribed reference level. A direct current power source supplies direct current power to the constant voltage circuit. A voltage creating circuit creates and outputs a voltage higher than that of the direct current power.
REFERENCES:
patent: 4464634 (1984-08-01), Velazquez
patent: 5289137 (1994-02-01), Nodar et al.
patent: 5880638 (1999-03-01), Schaffer
patent: 6909569 (2005-06-01), Makita et al.
patent: 3-204012 (1991-09-01), None
patent: 3817569 (2006-06-01), None
Cooper & Dunham LLP
Le Dinh T.
Ricoh Company, Ltd
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