SEMICONDUCTOR MEASUREMENT APPARATUS
    4.
    发明公开

    公开(公告)号:US20230400404A1

    公开(公告)日:2023-12-14

    申请号:US18154990

    申请日:2023-01-16

    IPC分类号: G01N21/21 G01B11/24

    摘要: A semiconductor measurement apparatus includes an illumination unit including a light source and at least one illumination polarization element, a light receiving unit including at least one light-receiving polarization element disposed on a path of light reflected by a sample, and an image sensor positioned to receive light passing through the at least one light-receiving polarization element and configured to output an original image, and a control unit configured to determine, by processing the original image, a selected critical dimension among critical dimensions of a structure included in a region of the sample. The control unit is configured to obtain a plurality of sample images by selecting regions of the original image in which a peak due to interference appears, to determine a plurality of elements included in a Mueller matrix using the plurality of sample images, and to determine the selected critical dimension based on the plurality of elements.

    Wearable device and method for controlling audio output using multi digital to analog converter path

    公开(公告)号:US12126975B2

    公开(公告)日:2024-10-22

    申请号:US17842044

    申请日:2022-06-16

    IPC分类号: H04R3/12 G10K11/178 H04S3/00

    摘要: A wearable device is provided and includes a plurality of speakers including a first speaker, a second speaker, and an Nth speaker, a plurality of digital to analog converter (DAC)s including a first DAC connected to the first speaker, a second DAC connected to the second speaker, and an Nth DAC connected to the Nth speaker, an audio signal processing module including N DAC output paths configured to filter an audio signal according to each frequency band and output the audio signal, a memory; and a processor electrically connected to the plurality of DACs, the audio signal processing module, and the memory, wherein the memory includes instructions causing the processor to, when the audio signal is reproduced, analyze a frequency component included in the audio signal, activate the N DAC output paths when the frequency component included in the audio signal has a full band range, activate only a DAC output path for processing a specific frequency band among the N DAC output paths when the frequency component included in the audio signal has only the specific frequency band, and output the audio signal through a speaker connected to the activated DAC output path.