Circuit and method for transmitting an output signal using a microelectromechanical systems varactor and a series inductive device
AssigneeAvago Technologies Wireless IP (Singapore) Pte. Ltd.
InventorChul Hong Park
Life of this patent
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Abstract
A circuit and method for transmitting an output signal utilizes an inductive device connected in series with a microelectromechanical systems (MEMS) varactor to increase the potential difference across the MEMS varactor due to the output signal by introducing inductance-capacitance resonant behavior. The MEMS varactor is configured to be actuated exclusively by the output signal to effectuate a change in capacitance of the MEMS varactor. The MEMS varactor is used to provide a variable impedance transformation.
Claims20
A circuit comprising:
- a first signal path connecting an input node to an output node on which a non-static signal is transmitted;
- a second signal path connecting a voltage terminal to the first signal path between the input node and the output node;
- a microelectromechanical systems varactor connected to the first signal path between the input node and the output node, the micoroelectromechanical systems varactor being configured to be actuated exclusively by the non-static signal to effectuate a change in capacitance of the microelectromechanical systems varactor;
- and
- an inductive device connected to the second signal path and connected in series with the microelectromechanical systems varactor to introduce a series inductance to increase a potential difference across the microelectromechanical systems varactor.
A method for transmitting an output signal to an output node, the method comprising:
- receiving the output signal at an input node;
- and
- providing a variable impedance transformation on a first signal path connecting the input node and the output node using a microelectromechanical systems varactor connected in series with an inductive device to partially transform a first impedance at the output node to a second impedance at the input node, the microelectromechanical systems varactor being connected to the first signal path between the input node and the output node, the inductive device being connected to a second signal path connecting a voltage terminal to the first signal path between the input node and the output node, the microelectromechanical systems varactor and the inductive device introducing inductance-capacitance resonant behavior to increase a potential difference across the microelectromechanical systems varactor caused by the output signal.
A circuit for transmitting an output signal comprising:
- a first signal path connecting an input node to an output node;
- a second signal path connecting a voltage terminal to the first signal path between the input node and the output node;
- a fixed impedance transformation circuit connected between the input node, the output node and the voltage terminal, the fixed impedance transformation circuit being configured to provide a to fixed impedance transformation to partially transform a first impedance at the output node to a second impedance at the input node;
- and
- a microelectromechanical systems varactor connected to the first signal path between the input node and the output node, the microelectromechanical systems varactor being configured to provide a variable impedance transformation to partially transform the first impedance at the output node to the second impedance at the input node;
- and
- an inductor connected to the second signal path and connected in series with the microelectromechanical systems varactor.
Dependencies are inferred from the claim text.