| Patent application number | Description | Published |
|---|
| 20090273256 | TRANSCEIVER CIRCUIT FOR FILM BULK ACOUSTIC RESONATOR (FBAR) TRANSDUCERS - 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. | 11-05-2009 |
| 20100112965 | Method and Apparatus to Transmit, Receive and Process Signals with Narrow Bandwith Devices - In a representative embodiment, an electronic transmitter comprises a signal source configured to provide an input signal comprising a plurality of frequency components; and a plurality of transducers each configured to receive the input signal and each configured to resonate substantially at one frequency of a subset of the plurality of frequency components. An electronic receiver, an acoustic transmitter and an acoustic receiver are also described. | 05-06-2010 |
| 20100117485 | PIEZOELECTRIC TRANSDUCERS WITH NOISE-CANCELLING ELECTRODES - In a representative embodiment, an apparatus comprises a transducer providing a first output; a capacitor providing a second output; a first load impedance connected to the first output; a second load impedance connected to the second output; and a differential amplifier having a first input connected to the first output and a second input connected to the second output. Illustratively, the first load impedance is connected electrically in parallel with the first input and the second load impedance is connected electrically in parallel with the second input. | 05-13-2010 |
| 20100232623 | TRANSDUCER DEVICE INCLUDING FEEDBACK CIRCUIT - A transducer device includes an acoustic transducer, a parameter extractor and a feedback circuit. The parameter extractor is configured to extract an operating parameter from the acoustic transducer. The feedback circuit is configured to generate a correction signal based on a difference between the extracted operating parameter and a corresponding reference parameter. The correction signal is applied to adjust the operating parameter of the acoustic transducer. | 09-16-2010 |
| 20100254550 | RECONFIGURABLE ACOUSTIC TRANSDUCER DEVICE - A device comprises: a first acoustic transducer; a second acoustic transducer; one or more transducer drivers; one or more signal receivers; and a transducer configuration device for selectively configuring connections between: (1) at least one of the first and second acoustic transducers; and (2) the one or more transducer drivers and the one or more signal receivers, according to a selected operating mode for the device among a plurality of possible operating modes. | 10-07-2010 |
| 20100327695 | Multi-frequency acoustic array - An apparatus comprises a substrate and transducers disposed over the substrate, each of the transducers comprising a different resonance frequency. A transducer device comprises circuitry configured to transmit signals, or to receive signals, or both. The transducer device also comprises a transducer block comprising a plurality of piezoelectric ultrasonic transducers (PMUT), wherein each of the PMUTs; and an interconnect configured to provide signals from the transducer block to the circuitry and to provide signals from the circuitry to the transducer block. | 12-30-2010 |
| 20110204749 | SHORT RANGE ULTRASONIC DEVICE WITH BROADBEAM ULTRASONIC TRANSDUCERS - An apparatus comprises a first transducer support configured to receive a first transducer in a first opening. A face of the first face of the transducer is located in a first plane. The apparatus also comprises a second transducer support configured to receive a second transducer in a second opening. A face of the second transducer is located in a second plane substantially parallel to the first plane. | 08-25-2011 |
