TRANSCEIVER CIRCUIT FOR FILM BULK ACOUSTIC RESONATOR (FBAR) TRANSDUCERS
First Claim
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1. 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.
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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.
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Citations
11 Claims
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1. A piezoelectric transducer device, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6)
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7. 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.- View Dependent Claims (8, 9, 10, 11)
Specification