Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2006-04-25
2006-04-25
Zweizig, Jeffrey (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
Reexamination Certificate
active
07034605
ABSTRACT:
An internal step-down power supply circuit has an internal step-down power-supply output node, a driver, a divider circuit and a current mirror circuit. The internal node provides an internal step-down power supply potential. The driver adjusts an external power-supply potential and provides an adjusted external power-supply potential to the internal node. The divider circuit divides a voltage that appears on the internal node and provides a divided voltage. The current mirror circuit is connected to the divider circuit. The current mirror circuit compares the voltage provided by the divider circuit and a reference voltage. The current mirror circuit sets the conductance of a first transistor feeding a current in response to the reference voltage to n times of the conductance of a second transistor feeding a current in response to the voltage provided from the divider circuit, wherein n is greater than 1.
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Harada Teruhiro
Otsuka Masayuki
Oki Electric Industry Co. Ltd.
Volentine Francos & Whitt PLLC
Zweizig Jeffrey
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