BAW OSCILLATORS WITH DUAL BAW TEMPERATURE SENSING

    公开(公告)号:US20230063409A1

    公开(公告)日:2023-03-02

    申请号:US17463406

    申请日:2021-08-31

    Abstract: A temperature compensated oscillator circuit includes a first oscillator, a second oscillator, a first divider, a second divider, a frequency ratio circuit, and a temperature compensation circuit. The first divider is coupled to the first oscillator, and is configured to divide a frequency of a first oscillator signal generated by the first oscillator. The second divider is coupled to the second oscillator, and is configured to divide a frequency of a second oscillator signal generated by the second oscillator. The frequency ratio circuit is coupled to the first divider and the second divider, and is configured to determine a frequency ratio of an output of the first divider to an output of the second divider. The temperature compensation circuit is coupled to the frequency ratio circuit and the first oscillator, and is configured to generate a compensated frequency based on the frequency ratio and the first oscillator signal.

    AMPLIFICATION USING AMBIPOLAR HALL EFFECT IN GRAPHENE

    公开(公告)号:US20200182950A1

    公开(公告)日:2020-06-11

    申请号:US16657281

    申请日:2019-10-18

    Abstract: An amplifier includes a graphene Hall sensor (GHS). The GHS includes a graphene layer formed above a substrate, a dielectric structure formed above a channel portion of the graphene layer, and a conductive gate structure formed above at least a portion of the dielectric structure above the channel portion of the graphene layer for applying a gate voltage. The GHS also includes first and second conductive excitation contact structures coupled with corresponding first and second excitation portions of the graphene layer for applying at least one of the following to the channel portion of the graphene layer: a bias voltage; and a bias current. The GHS further includes first and second conductive sense contact structures coupled with corresponding first and second sense portions of the graphene layer. The amplifier also includes a current sense amplifier (CSA) coupled to the GHS. The CSA senses current output from the GHS.

    CALIBRATION SCHEME FOR GAS ABSORPTION SPECTRA DETECTION
    14.
    发明申请
    CALIBRATION SCHEME FOR GAS ABSORPTION SPECTRA DETECTION 有权
    用于气体吸收光谱检测的校准方案

    公开(公告)号:US20140368376A1

    公开(公告)日:2014-12-18

    申请号:US13916273

    申请日:2013-06-12

    CPC classification number: G01N22/00 G01J3/28 G01J3/42 G01S7/40 G01S7/41

    Abstract: A technique for removing the background from a transmission spectrum including determining performance characteristics of a detector, measuring a transmission spectrum that includes an absorption line, determining performance characteristics of a gas cell, and removing a background spectrum from the transmission spectrum by combining the transmission spectrum with the performance characteristics of the detector and the performance characteristics of the gas cell.

    Abstract translation: 一种用于从传输频谱中去除背景的技术,包括确定检测器的性能特征,测量包括吸收线的透射光谱,确定气体单元的性能特征,以及通过组合透射光谱来从透射光谱中去除背景光谱 具有检测器的性能特征和气室的性能特征。

    RADIATOR LAYERS FOR ULTRASONIC TRANSDUCERS
    15.
    发明公开

    公开(公告)号:US20240113063A1

    公开(公告)日:2024-04-04

    申请号:US17957446

    申请日:2022-09-30

    Abstract: In examples, a semiconductor die comprises a semiconductor substrate having a surface, the surface having first and second surface portions, and a radiator layer on the surface. The radiator layer comprises a metal member having a first metal member portion above the first surface portion and a second metal member portion above the second surface portion, a first distance between the first metal member portion and the first surface portion, and a second distance between the second metal member portion and the second surface portion, the first distance less than the second distance. The radiator layer includes first and second electrodes. The radiator layer includes a piezoelectric layer extending along a length of the radiator layer and on each of the first and second electrodes, the piezoelectric layer between the first and second metal members and the semiconductor substrate.

    NARROWBAND TIA AND SIGNALING FOR OPTICAL DISTANCE MEASUREMENT SYSTEMS

    公开(公告)号:US20220397649A1

    公开(公告)日:2022-12-15

    申请号:US17872383

    申请日:2022-07-25

    Abstract: An optical distance measurement system includes a transmission circuit and a receive circuit. The transmission circuit is configured to generate narrowband intensity modulated light transmission signals over a first band of frequencies and direct the narrowband light transmission signal toward a target object. The receive circuit is configured to receive reflected light off the target object, convert the reflected light into a current signal proportional to the intensity of the reflected light, filter frequencies outside a second band of frequencies from the current signal to create a filtered current signal, and convert the filtered current signal into a voltage signal. The second band of frequencies corresponds with the first band of frequencies.

    SEMICONDUCTOR FORCE SENSORS
    18.
    发明申请

    公开(公告)号:US20220221353A1

    公开(公告)日:2022-07-14

    申请号:US17538782

    申请日:2021-11-30

    Abstract: A force sensor including a semiconductor die, and a die pad coupled to the semiconductor die, the semiconductor die configured to detect a force in the die pad. In addition, the force sensor includes a mold compound covering the semiconductor die and having an outer perimeter, a first side, and a second side opposite the first side, the outer perimeter extending between the first side and the second side, the die pad exposed out of the mold compound along the first side. Further, the force sensor includes a mounting frame engaged with the die pad along the second side of the mold compound, the mounting frame including multiple mounting pads extended outward in multiple directions from the outer perimeter.

    FREQUENCY MODULATION FOR INTERFERENCE FREE OPTICAL TIME OF FLIGHT SYSTEM

    公开(公告)号:US20190018138A1

    公开(公告)日:2019-01-17

    申请号:US15649493

    申请日:2017-07-13

    Abstract: An optical time of flight system includes a transmitter and a receiver. The transmitter is configured to generate a modulation signal having a modulation signal frequency that varies as a function of time, generate an optical waveform with amplitude modulation corresponding to the modulation signal, and direct the optical waveform toward a field of view (FOV). The receiver is configured to receive the optical waveform reflected off of an object within the FOV and determine a distance to the object based on a time of flight from the transmitter to the object and back to the receiver.

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