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US 8,078,128 B2Granted
Selectable capacitance circuit
AssigneeQUALCOMM MEMS Technologies, Inc.
InventorPhilip D. Floyd
Life of this patent
Estimating the term…
Abstract
A voltage-controlled capacitor and methods for forming the same are described. A mechanical conductor membrane of the voltage-controlled capacitor is movable to and from a first position and a second position. An amount of capacitance can vary with the movement of the mechanical conductor membrane. A microelectromechanical systems (MEMS) voltage-controlled capacitor can be used in a variety of applications, such as, but not limited to, RF switches and RF attenuators.
Claims12
A capacitor having a selectable capacitance comprising:
- a signal conductor;
- a first mechanical conductor membrane coupled to a first bias configured to control positioning of the first mechanical conductor membrane relative to the signal conductor;
- and
- a second mechanical conductor membrane coupled to a second bias configured to control positioning of the second mechanical conductor membrane relative to the signal conductor independent of the positioning of the first mechanical conductor membrane,
- wherein a capacitance is defined by a combination of the positioning of the first mechanical conductor membrane and the positioning of the second mechanical conductor membrane.
2 more elements
A capacitor having a selectable capacitance comprising:
- means for conducting a signal;
- a first means for adjusting capacitance coupled to a first means for controlling positioning of the first capacitance adjusting means relative to the conducting means;
- and
- a second means for adjusting capacitance coupled to a second means for controlling positioning of the second capacitance adjusting means relative to the conducting means independent of the positioning of the first capacitance adjusting means,
- wherein a capacitance is defined by a combination of the positioning of the first capacitance adjusting means and the positioning of the second capacitance adjusting means.
2 more elements
Dependencies are inferred from the claim text.