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US 7,009,455 B2Granted
Tunable power amplifier matching circuit
AssigneeKyocera Wireless Corp.
InventorsStanley S. Toncich, Tim Forrester
Life of this patent
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Abstract
A power amplifier matching circuit is provided. The matching circuit includes a ferro-electric tunable component. A control signal is applied to the tunable component, changing the component's impedance. This changes the impedance of the matching circuit.
Claims15
A tunable power amplifier system comprising:
- a power amplifier;
- a power amplifier output matching circuit coupled to the power amplifier, the power amplifier output matching circuit having an impedance and comprising a ferro-electric tunable component, the ferro-electric tunable component having a ferro-electric material with an electrically tunable dielectric constant;
- a control line operably coupled to the ferro-electric component;
- a control source electrically coupled to the control line, the control source configured to transmit a control signal on the control line;
- wherein the ferro-electric component, responsive to the control signal, adjusts the impedance of the matching circuit.
2 more elements
A method of tuning an impedance match of a power amplifier comprising:
- generating a control signal;
- coupling the control signal to a ferro-electric component, the ferro-electric component having a ferro-electric material with an electrically tunable dielectric constant;
- changing an impedance of the component, responsive to the control signal;
- changing the impedance match of the power amplifier responsive to changing the impedance of the component.
1 more element
A wireless communication device comprising:
- a battery;
- a transceiver;
- a user interface;
- a housing encasing the battery and the transceiver and adapted to present the user interface external to the housing;
- a power amplifier;
- a power amplifier output matching circuit coupled to the power amplifier, the power amplifier output matching circuit having an impedance and comprising a ferro-electric tunable component, the ferro-electric tunable component having a ferro-electric tunable material with an electrically tunable dielectric constant;
- a control signal generator for generating a control signal;
- a control line coupled to the control signal generator and to the ferro-electric component;
- a control source electrically coupled to the control line, the control source configured to transmit a control signal on the control line;
- wherein the ferro-electric component, responsive to the control signal, adjusts the impedance of the matching circuit.
7 more elements
Dependencies are inferred from the claim text.