THERMOGRAPHIC SENSOR WITH THERMO-COUPLES ON A SUSPENDED GRID AND PROCESSING CIRCUITS IN FRAMES THEREOF

    公开(公告)号:US20230324229A1

    公开(公告)日:2023-10-12

    申请号:US18335003

    申请日:2023-06-14

    摘要: A thermographic sensor is proposed. The thermographic sensor includes a plurality of sensing elements each comprising at least one thermo-couple. The thermographic sensor is integrated on a semiconductor on insulator body that is patterned to define a grid suspended from a substrate; for each sensing element, the grid has a frame with the cold joint of the thermo-couple, a plate with the hot joint of the thermo-couple and one or more arms sustaining the plate from the frame. The frames include one or more conductive layers of thermally conductive material for thermally equalizing the cold joints with the substrate. Moreover, each sensing element may also include a processing circuit for the thermo-couple that is integrated on the corresponding frame. A thermographic device including the thermographic sensor and a corresponding signal processing circuit, and a system including one or more thermographic devices are also proposed.

    LOW-DROPOUT VOLTAGE REGULATOR CIRCUIT AND CORRESPONDING METHOD OF OPERATION

    公开(公告)号:US20240036595A1

    公开(公告)日:2024-02-01

    申请号:US18224897

    申请日:2023-07-21

    IPC分类号: G05F1/565 G05F1/575

    CPC分类号: G05F1/565 G05F1/575

    摘要: A low-drop out voltage regulator includes a pass element arranged between an input terminal and an output terminal, a feedback network configured to produce a feedback voltage derived from an output voltage, and an error amplifier configured to drive the pass element as a function of a difference between the feedback voltage and a reference voltage. An output transistor coupled in series with the pass element is controlled by a mode selection circuit. In response to assertion of a mode selection signal, the mode selection circuit turns on the output transistor to sink a current with a controlled magnitude from the output node. In response to de-assertion of the mode selection signal, the mode selection circuit sinks a current with a controlled magnitude from a control terminal of the output transistor to turn off the output transistor at a controlled rate.

    THERMOGRAPHIC SENSOR WITH THERMAL TRANSISTORS DRIVEN BY THERMO-COUPLES

    公开(公告)号:US20220170795A1

    公开(公告)日:2022-06-02

    申请号:US17537074

    申请日:2021-11-29

    摘要: A thermographic sensor is proposed. The thermographic sensor includes one or more thermo-couples, each for providing a sensing voltage depending on a difference between a temperature of a hot joint and a temperature of a cold joint of the thermo-couple; the thermographic sensor further comprises one or more sensing transistors, each driven according to the sensing voltages of one or more corresponding thermo-couples for providing a sensing electrical signal depending on its temperature and on the corresponding sensing voltages. A thermographic device including the thermographic sensor and a corresponding signal processing circuit, and a system including one or more thermographic devices are also proposed.

    SEMICONDUCTOR METAL OXIDE BASED GAS SENSOR ACTIVATED AT ZERO HEATER POWER

    公开(公告)号:US20230236161A1

    公开(公告)日:2023-07-27

    申请号:US18091470

    申请日:2022-12-30

    IPC分类号: G01N33/00 G01N27/04

    CPC分类号: G01N33/0027 G01N27/045

    摘要: A gas sensor is formed by a thin-film semiconductor metal-oxide gas sensing layer, with a thermally conductive and electrically-insulating layer in direct physical contact with a back of the gas sensing layer to carry the gas sensing layer. Sensing circuitry applies a voltage to the gas sensing layer and measures a current flowing through the gas sensing layer. The current flowing through the gas sensing layer is indicative of whether a gas under detection has been detected by the gas sensing layer, and serves to self-heat the gas sensing layer. A support structure extends from a substrate to make direct physical contact with and carry the thermally conductive and electrically insulating layer about a perimeter of a back face thereof, with the support structure shaped to form an air gap between the back of the thermally conductive and electrically insulating layer and a front of the substrate.

    THERMOGRAPHIC SENSOR WITH THERMO-COUPLES ON A SUSPENDED GRID AND PROCESSING CIRCUITS IN FRAMES THEREOF

    公开(公告)号:US20220170794A1

    公开(公告)日:2022-06-02

    申请号:US17537086

    申请日:2021-11-29

    摘要: A thermographic sensor is proposed. The thermographic sensor includes a plurality of sensing elements each comprising at least one thermo-couple. The thermographic sensor is integrated on a semiconductor on insulator body that is patterned to define a grid suspended from a substrate; for each sensing element, the grid has a frame with the cold joint of the thermo-couple, a plate with the hot joint of the thermo-couple and one or more arms sustaining the plate from the frame. The frames include one or more conductive layers of thermally conductive material for thermally equalizing the cold joints with the substrate. Moreover, each sensing element may also include a processing circuit for the thermo-couple that is integrated on the corresponding frame. A thermographic device including the thermographic sensor and a corresponding signal processing circuit, and a system including one or more thermographic devices are also proposed.