Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2006-08-03
2008-10-07
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
C327S536000, C327S537000
Reexamination Certificate
active
07432756
ABSTRACT:
A charge pump circuit employs an oscillator powered by a variable positive supply voltage, storage and switching circuitry controlled by an oscillator signal from the oscillator, and a regulator that maintains a negative supply voltage generated by the storage and switching circuitry at a target value through control of the variable positive supply voltage. The charge pump can be used in a power stage employing normally on switching transistors (such as silicon carbide junction FETs or SiC JFETs) that require a negative voltage to be turned completely off. Such power stages are in turn useful in applications including military aerospace applications having harsh electromagnetic interference (EMI) conditions, where they may be controlled by optical control signals conveyed by optical fibers from a more benign operating environment within the body of an aircraft.
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BainwoodHuang
HR Textron Inc.
Le Dinh T.
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