公开(公告)号：US20230073537A1

公开(公告)日：2023-03-09

申请号：US17691987

申请日：2022-03-10

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： David Patrick MAGEE ,  Hailong CHEN ,  James Kelly GRIFFIN

IPC: G02B27/00 ,  B06B1/06

Abstract: In an example, a system includes an ultrasonic transducer and a bracket coupled to the ultrasonic transducer. The system also includes a lens coupled to the bracket. The system includes a control circuit coupled to the ultrasonic transducer and configured to excite the ultrasonic transducer with a signal to clean the lens.

公开(公告)号：US20220080458A1

公开(公告)日：2022-03-17

申请号：US17475886

申请日：2021-09-15

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Supriyo PALIT ,  James Kelly GRIFFIN ,  David Patrick MAGEE

IPC: B06B1/02 ,  G02B27/00 ,  B08B7/02 ,  B08B13/00

Abstract: In an example, a method includes providing a pulse-width modulation (PWM) excitation signal to a piezo transducer via a transmit path. The method also includes collecting a block of samples of a current and a voltage at the piezo transducer, where the block of samples is collected in sub-blocks of samples between interrupts in a receive path. The method includes processing each sub-block of samples separately from other sub-blocks of samples. The method also includes, responsive to the sub-blocks of the block of samples being processed, analyzing the block of samples. The method includes, responsive to the analysis, modifying the PWM excitation signal.