Electric power conversion systems – Current conversion – With voltage multiplication means
Reexamination Certificate
2005-05-31
2008-09-30
Han, Jessica (Department: 2838)
Electric power conversion systems
Current conversion
With voltage multiplication means
C363S059000, C363S061000, C327S536000, C307S109000
Reexamination Certificate
active
07430133
ABSTRACT:
A switched-capacitor type voltage regulator is provided. The regulator includes a flying capacitor and switches, including first and second transistors which operate as switches. The switches are arranged to operate such that the flying capacitor is coupled to an input voltage during a first phase, and switched to provide an output voltage during a second phase. During the first phase, the first transistor is employed to couple the capacitor to the input voltage, and a second transistor is employed to couple (the other side of) the capacitor to another node (e.g. Ground). Additionally, another switch is coupled between the gate and the drain of either the first transistor or the second transistor. Also, during the first phase, if the input voltage is greater than the output voltage, the other switch is closed so that the transistor that the other switch is connected to operates as a diode.
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Ma Mengzhe
McIntyre William J.
Darby & Darby PC
Gaffney Matthew M.
Han Jessica
National Semiconductor Corporation
Pham Emily
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