Selectable capacitance circuit
First Claim
Patent Images
1. 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.
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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.
68 Citations
12 Claims
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1. A capacitor having a selectable capacitance comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A capacitor having a selectable capacitance comprising:
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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.
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Specification