DRIVER CIRCUITRY FOR PIEZOELECTRIC TRANSDUCERS

    公开(公告)号:US20240269706A1

    公开(公告)日:2024-08-15

    申请号:US18644538

    申请日:2024-04-24

    CPC classification number: B06B1/0261 B06B2201/55

    Abstract: The present disclosure relates to driver circuitry for driving a piezoelectric transducer. The circuitry comprises: a power supply; a reservoir capacitance; switch network circuitry; and control circuitry. The control circuitry is configured to control operation of the switch network circuitry so as to charge the reservoir capacitance from the power supply and to transfer charge between the reservoir capacitance and the piezoelectric transducer.

    SIGNAL PROCESSING DEVICE, ULTRASONIC SENSOR AND VEHICLE

    公开(公告)号:US20240201348A1

    公开(公告)日:2024-06-20

    申请号:US18537109

    申请日:2023-12-12

    Applicant: ROHM CO., LTD.

    Inventor: Koji Saito

    CPC classification number: G01S7/52004 B06B1/0644 G01S15/931 B06B2201/55

    Abstract: The present disclosure provides a signal processing device. The signal processing device includes a receiving circuit, an envelope detection circuit, a differential amplifier circuit and a selection circuit. The receiving circuit is configured to generate a reflected wave signal based on a reflected wave from an object. The envelope detection circuit is configured to generate an envelope detection signal of the reflected wave signal. The differential amplifier circuit is configured to generate a differentially amplified signal of the envelope detection signal. The selection circuit is configured to select one of a first signal and a second signal. The first signal is the envelope detection signal or a delayed signal of the envelope detection signal. The second signal is the differentially amplified signal or a signal obtained using a difference between the envelope detection signal and the differentially amplified signal.

    Driver circuitry for piezoelectric transducers

    公开(公告)号:US11998948B2

    公开(公告)日:2024-06-04

    申请号:US16921369

    申请日:2020-07-06

    CPC classification number: B06B1/0261 B06B2201/55

    Abstract: The present disclosure relates to driver circuitry for driving a piezoelectric transducer. The circuitry comprises: a power supply; a reservoir capacitance; switch network circuitry; and control circuitry. The control circuitry is configured to control operation of the switch network circuitry so as to charge the reservoir capacitance from the power supply and to transfer charge between the reservoir capacitance and the piezoelectric transducer.

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