中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

48 records (took 0.022 seconds)

    Four-stage circuit architecture for detecting pulsed signals
    22.
    发明授权
    Four-stage circuit architecture for detecting pulsed signals 有权
    用于检测脉冲信号的四级电路架构

    公开(公告)号：US09130070B2

    公开(公告)日：2015-09-08

    申请号：US13870669

    申请日：2013-04-25

    Applicant: ANALOG DEVICES, INC.

    Inventor： Shrenik Deliwala ,  Steven J. Decker ,  Dan M. Weinberg

    IPC: H01J40/14 ,  H03F3/08 ,  H01L27/00 ,  H01L31/02 ,  H03F3/45 ,  A61B5/00 ,  A61B5/024

    CPC classification number: H01L31/02016 ,  A61B5/0059 ,  A61B5/02433 ,  A61B5/7225 ,  H01L31/02019 ,  H03F3/45 ,  H04B2210/003

    Abstract: An electrical circuit includes a photodiode that receives a light signal from a light source and generates a photocurrent signal, a trans-impedance amplifier that amplifies the photocurrent signal and generates a low noise signal, and a high pass filter that converts the low noise signal into an alternating current (AC) signal having a positive amplitude, a negative amplitude, and a zero cross-over point between the positive amplitude and the negative amplitude. The electrical circuit also includes a positive integrating amplifier that receives the positive amplitude of the AC signal and generates a positive integrated value over an integration period, and a negative integrating amplifier that receives the negative amplitude of the AC signal and generates a negative integrated value over the integration period. The electrical circuit further includes at least one analog-to-digital converter that receives the positive and negative integrated values.

    Abstract translation: 电路包括光电二极管，其接收来自光源的光信号并产生光电流信号，放大光电流信号并产生低噪声信号的跨阻放大器，以及将低噪声信号转换成 在正振幅和负振幅之间具有正振幅，负振幅和零交叉点的交流（AC）信号。 电路还包括正积分放大器，其接收AC信号的正幅度并在积分周期上产生正积分值，以及负积分放大器，其接收AC信号的负幅度并产生负积分值 整合期。 电路还包括至少一个模数转换器，其接收正积分值和负积分值。

    Optical improvements to compact smoke detectors, systems and apparatus
    23.
    发明授权
    Optical improvements to compact smoke detectors, systems and apparatus 有权

    公开(公告)号：US11796445B2

    公开(公告)日：2023-10-24

    申请号：US16825339

    申请日：2020-03-20

    Applicant: Analog Devices, Inc.

    Inventor： Shrenik Deliwala

    IPC: G01N15/14 ,  G08B17/107

    CPC classification number: G01N15/1434 ,  G01N15/1429 ,  G08B17/107

    Abstract: Device for improving an optical detecting smoke apparatus and implementing thereof. Apparatus and methods for detecting the presence of smoke in a small, long-lasting smoke detector are disclosed. Specifically, the present disclosure shows how to build one or more optimized blocking members in a smoke detector to augment signal to noise ratio. This is performed while keeping the reflections from the housing structure to a very low value while satisfying all the other peripheral needs of fast response to smoke and preventing ambient light. This allows very small measurements of light scattering of the smoke particles to be reliable in a device resistant to the negative effects of dust. In particular, geometrical optical elements, e.g., cap and optical defection elements, are disclosed.

    Circuit architecture for mode switch
    25.
    再颁专利
    Circuit architecture for mode switch 有权

    公开(公告)号：USRE48996E1

    公开(公告)日：2022-03-29

    申请号：US15975608

    申请日：2018-05-09

    Applicant: Analog Devices, Inc.

    Inventor： Shrenik Deliwala ,  Steven J. Decker ,  Gregory T. Koker ,  Dan M. Weinberg

    IPC: G01R15/09 ,  G01R1/38 ,  A61B5/024 ,  G01J1/44

    Abstract: A current detection module capable of differentiating and quantifying contribution to a current signal generated by a sensor in response to stimulation by a certain target source from contributions from sources other than the target source (ambient sources) is disclosed. As long as the contribution from the target source comprises a pulsed signal, the module may synchronize itself to the pulse(s) so that there is a predetermined phase relationship between the pulse(s) and functions carried out by various stages of the module. The module may be re-used to also detect and quantify contributions from ambient sources by presenting these contributions to the module as pulses that trigger synchronization of the module. To that end, a detection system disclosed herein is based on the use of such current detection module and allows mode switching where, depending on the selected mode of operation, the module is configured to perform different measurements.

    Low frequency noise improvement in plethysmography measurement systems
    26.
    发明授权
    Low frequency noise improvement in plethysmography measurement systems 有权

    公开(公告)号：US11229373B2

    公开(公告)日：2022-01-25

    申请号：US14500129

    申请日：2014-09-29

    Applicant: Analog Devices, Inc.

    Inventor： Shrenik Deliwala

    IPC: A61B5/1455 ,  A61B5/024 ,  A61B5/00

    Abstract: A plethysmography (“PPG”) measurement system may include at least one source of PPG radiation and at least one auxiliary sensor for detection of PPG radiation. The radiation source emits a portion of the PPG radiation toward a subject and another portion along an optical path for direct communication between the PPG radiation source and the auxiliary sensor. The auxiliary sensor may develop a profile against which measurements from primary PPG sensors, which receive light returning from the subject, may be compared. From this comparison, new PPG signals may be generated that exhibit lower noise than the PPG signals output by PPG sensors. These noise mitigation techniques may be used advantageously by a PPG system to generate more accurate measurements and also to reduce power consumption by the radiation sources.

    Compact optical gas detection system and apparatus
    28.
    发明授权
    Compact optical gas detection system and apparatus 有权

    公开(公告)号：US10830693B2

    公开(公告)日：2020-11-10

    申请号：US15993188

    申请日：2018-05-30

    Applicant: Analog Devices, Inc.

    Inventor： Shrenik Deliwala

    IPC: G01N21/61 ,  G01N21/3504 ,  G01N21/01

    Abstract: System and apparatus for portable gas detection. Specifically, this disclosure describes apparatuses and systems for optical gas detection in a compact package. There is a need for a very compact, low-power, gas detection system for gases such as CO2, NOx, water vapor, methane etc. This disclosure provides an ultra-compact and highly efficient optical measurement system based on principals of optical absorption spectroscopy. It reduces the size of the instrument as well its power consumption by more than an order of magnitude making it possible to deploy it widely. There is an identified need for large number of distributed gas sensors to improve human health, environment, and save energy usage.

    SMOKE DETECTOR CHAMBER BOUNDARY SURFACES
    29.
    发明申请
    SMOKE DETECTOR CHAMBER BOUNDARY SURFACES 审中-公开

    公开(公告)号：US20190187038A1

    公开(公告)日：2019-06-20

    申请号：US16206268

    申请日：2018-11-30

    Applicant: Analog Devices, Inc.

    Inventor： Shrenik Deliwala

    IPC: G01N15/06

    CPC classification number: G01N15/06 ,  G01N2015/0693 ,  G08B17/103 ,  G08B17/107

    Abstract: Device for optically detecting smoke and implementing thereof. Apparatus and methods for detecting the presence of smoke in a small, long-lasting smoke detector are disclosed. Specifically, the present disclosure shows how to build a very compact housing around the smoke detector while keeping the reflections from the housing structure to a very low value while satisfying all the other peripheral needs of fast response to smoke and preventing ambient light. This allows very small measurements of light scattering of the smoke particles to be reliable in a device resistant to the negative effects of dust. In particular, geometrical optical elements, e.g., cap and optical defection elements, are disclosed.

    INTEGRATED GESTURE SENSOR MODULE
    30.
    发明申请
    INTEGRATED GESTURE SENSOR MODULE 审中-公开
    集成式传感器模块

    公开(公告)号：US20140340302A1

    公开(公告)日：2014-11-20

    申请号：US14276238

    申请日：2014-05-13

    Applicant: ANALOG DEVICES, INC.

    Inventor： Dipak Sengupta ,  Shrenik Deliwala ,  Ying Zhao ,  Bruce Fried ,  William Schoppee ,  Woodrow Beckford

    IPC: G06F3/042 ,  G06F3/01

    CPC classification number: G06F3/042 ,  G06F3/017 ,  H01L2224/48095 ,  H01L2224/48145 ,  H01L2224/48465 ,  H01L2224/73265 ,  Y10T29/49826 ,  H01L2924/00012

    Abstract: An integrated gesture sensor module includes an optical sensor die, an application-specific integrated circuit (ASIC) die, and an optical emitter die disposed in a single package. The optical sensor die and ASIC die can be disposed in a first cavity of the package, and the optical emitter die can be disposed in a second cavity of the package. The second cavity can be conical or step-shaped so that the opening defining the cavity increases with distance from the upper surface of the optical emitter die. The upper surface of the optical emitter die may be higher than the upper surface of the optical sensor die. An optical barrier positioned between the first and second cavities can include a portion of a pre-molded, laminate, or ceramic package, molding compound, and/or metallized vias.

    Abstract translation: 集成的手势传感器模块包括光学传感器芯片，专用集成电路（ASIC）裸片和设置在单个封装中的光发射器管芯。 光学传感器管芯和ASIC管芯可以设置在封装的第一腔中，并且光发射器管芯可以设置在封装的第二腔中。 第二空腔可以是圆锥形或阶梯形的，使得限定空腔的开口随着距离光发射器管芯的上表面的距离而增加。 光发射器管芯的上表面可以高于光学传感器管芯的上表面。 位于第一和第二腔之间的光学屏障可以包括预成型，层压或陶瓷封装，模塑料和/或金属化通孔的一部分。

Patent Agency Ranking