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US 7,522,016 B2Granted
Tunable surface acoustic wave resonators
AssigneeQUALCOMM Incorporated
InventorsStanley Slavko Toncich, Aracely Williams, Raymond C. Wallace, Soon-Seng Lau, Steven C. Ciccarelli
Life of this patent
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Abstract
A tunable SAW resonator circuit is disclosed. The tunable SAW resonator circuit includes a SAW resonator having a Q, a resistor coupled to the SAW resonator to reduce the Q, and a tuning component coupled to the SAW resonator to tune the SAW resonator. A method to tune the SAW resonator is also disclosed. The SAW resonator may be tuned by applying a control signal to the tuning component.
Claims15
A circuit, comprising:
- a transceiver, comprising:
- a receiver;
- a transmitter;
- and
- a duplexer coupled to the receiver and transmitter, wherein the transmitter or receiver includes a tunable SAW resonator, the SAW resonator has a Q, the transmitter or receiver further comprises a resistor coupled to the SAW resonator to reduce the Q, and a tuning component configured to tune the SAW resonator, the tuning component and the SAW resonator are arranged to form a filter, the filter comprises a notch filter wherein the notch filter is used in the receiver to vary the transmit signal rejection of the duplexer.
2 more elements
A transceiver, comprising:
- a receiver;
- a transmitter;
- and
- a duplexer coupled to the receiver and transmitter;
- wherein the transmitter or receiver includes a tunable SAW resonator, the SAW resonator has a Q, the transmitter or receiver further comprises a resistor coupled to the SAW resonator to reduce the Q, and a tuning component configured to tune the SAW resonator, the tuning component and the SAW resonator are arranged to form a filter, the filter comprises a notch filter wherein the notch filter is used in the receiver to vary the transmit signal rejection of the duplexer.
2 more elements
A transceiver, comprising:
- a receiver;
- a transmitter;
- and
- a duplexer having a transmit filter coupled to the transmitter and a receive filter coupled to the receiver, each of the filters having a tunable SAW resonator, the SAW resonators have a Q, the transmit filter further comprises a resistor coupled to the SAW resonator in the transmit filter to reduce the Q of the SAW resonator in the transmit filter, and the receive filter further comprises a resistor coupled to the SAW resonator in the receive filter to reduce the Q of the SAW resonator in the receive filter, the receiver comprises a notch filter having a tunable SAW resonator, wherein the notch filter is used in the receiver to vary the transmit signal rejection of the duplexer.
1 more element
A method of tuning a SAW resonator in a circuit, comprising:
- generating a control signal;
- and
- tuning the SAW resonator with the control signal, wherein the circuit comprises a transceiver, comprising:
- a receiver;
- a transmitter;
- and
- a duplexer coupled to the receiver and transmitter;
- wherein the transmitter or receiver includes a tunable SAW resonator, the SAW resonator has a Q, the transmitter or receiver further comprises a resistor coupled to the SAW resonator to reduce the Q, and a tuning component configured to tune the SAW resonator, the tuning component and the SAW resonator are arranged to form a filter, the filter comprises a notch filter wherein the notch filter is used in the receiver to vary the transmit signal rejection of the duplexer.
5 more elements
Dependencies are inferred from the claim text.