Transceiver circuit for film bulk acoustic resonator (FBAR) transducers
AssigneeAvago Technologies Wireless IP (Singapore)
InventorsSteven Martin, Osvaldo Buccafusca
Life of this patent
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Abstract
A piezoelectric transducer device includes a receive signal path, a transistor and a piezoelectric transducer connected to a first terminal of the transistor. The device also includes a switch connected to a second terminal of the transistor, wherein the switch is adapted to selectively connect the second terminal of the transistor to a transmit signal or to a bias voltage; an output connected to a third terminal of the transistor, and adapted to receive a signal from the transducer when the switch is connected to the bias voltage, wherein the switch is not in the receive signal.
Claims11
A piezoelectric transducer device, comprising:
- a receive signal path;
- a transistor;
- a piezoelectric transducer connected to a first terminal of the transistor;
- a switch connected to a second terminal of the transistor, wherein the switch is adapted to selectively connect the second terminal of the transistor to a transmit signal or to a bias voltage;
- and
- an output connected to a third terminal of the transistor, and adapted to receive a signal from the transducer when the switch is connected to the bias voltage, wherein the switch is not in the receive signal path.
A sensor, comprising:
- piezoelectric transducer device, comprising:
- a transistor;
- a piezoelectric transducer connected to a first terminal of the transistor;
- a switch connected to a second terminal of the transistor, wherein the switch is adapted to selectively connect the second terminal of the transistor to a transmit signal or to a bias voltage;
- and an output connected to a third terminal of the transistor, and adapted to receive a signal from the transducer when the switch is connected to the bias voltage.
Dependencies are inferred from the claim text.