公开(公告)号：US11821836B2

公开(公告)日：2023-11-21

申请号：US17327172

申请日：2021-05-21

Applicant: Analog Devices, Inc.

Inventor： Shrenik Deliwala

IPC: G01N21/3504 ,  G01N21/01

CPC classification number: G01N21/3504 ,  G01N21/01 ,  G01N2021/3513 ,  G01N2201/0636 ,  G01N2201/1211

Abstract: System and apparatus for robust, portable gas detection. Specifically, this disclosure describes apparatuses and systems for optical gas detection in a compact package using two optical pathways. 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 stable and efficient optical measurement system based on principals of optical absorption spectroscopy using substantially collinear pathways.

公开(公告)号：US11788942B2

公开(公告)日：2023-10-17

申请号：US16181878

申请日：2018-11-06

Applicant: Analog Devices, Inc.

Inventor： Shrenik Deliwala

IPC: G01N15/06 ,  G08B17/107 ,  G08B17/113 ,  G01N15/00

CPC classification number: G01N15/06 ,  G08B17/107 ,  G08B17/113 ,  G01N2015/0046 ,  G01N2015/0693

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.

公开(公告)号：US11747272B2

公开(公告)日：2023-09-05

申请号：US16872758

申请日：2020-05-12

Applicant: Analog Devices, Inc.

Inventor： Shrenik Deliwala

IPC: G01N21/3504 ,  G01N33/00

CPC classification number: G01N21/3504 ,  G01N33/004 ,  G01N2201/062 ,  G01N2201/0668 ,  G01N2201/0686

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.

公开(公告)号：US11511037B2

公开(公告)日：2022-11-29

申请号：US16434761

申请日：2019-06-07

Applicant: Analog Devices, Inc.

Inventor： Shrenik Deliwala

IPC: A61M5/168 ,  A61B5/15 ,  A61B90/00 ,  A61B5/00 ,  A61B5/0531 ,  A61M5/142

Abstract: Systems and methods are provided for measuring depth, position, and/or angle of a cannula in a medical drug delivery device. In particular, a drug delivery device having a cannula is positioned adjacent to tissue, a voltage pulse is provided to the cannula, a charge is measured at an electrode in the drug delivery device, and the depth of penetration of the cannula is determined based in part on the charge at the first electrode. Systems and methods described herein can be used to determine subcutaneous insertion depth in a wearable bolus injector. In some implementations, insertion depth determination is achieved through capacitive sensors which measure needle depth in a drug delivery device.

公开(公告)号：USD920825S1

公开(公告)日：2021-06-01

申请号：US29692091

申请日：2019-05-22

Applicant: Analog Devices, Inc.

Designer： Jiawen Bai ,  Ryan Frazier ,  Ying Zhao ,  Shrenik Deliwala

公开(公告)号：US10969254B2

公开(公告)日：2021-04-06

申请号：US16880109

申请日：2020-05-21

Applicant: Analog Devices, Inc.

Inventor： Shrenik Deliwala

IPC: G01D5/353 ,  G02B6/42 ,  G02B6/02 ,  H01L31/167 ,  G02B6/293

Abstract: Fiber Bragg grating interrogation and sensing used for strain and temperature measurements. A simple, broadband light source is used to interrogate one or more fiber Bragg grating (FBG). Specifically, a packaged LED is coupled to fiber, the light therefrom is reflected off a uniform FBG. The reflected light is subsequently analyzed using a filter and a plurality of Si photodetectors. In particular, the filter is a chirped FBG or an optically coated filter, in accordance with some embodiments. Measurement analysis is performed by ratio of intensities at the plurality of detectors, at least in part.

公开(公告)号：US20200161502A1

公开(公告)日：2020-05-21

申请号：US16679549

申请日：2019-11-11

Applicant: Analog Devices, Inc.

Inventor： Shrenik Deliwala ,  Ryan Michael Iutzi

IPC: H01L33/06 ,  H01L33/58 ,  H01L33/64 ,  H01L31/0352 ,  H01L31/0232 ,  H01L31/024

Abstract: A device emitting mid-infrared light that comprises a semiconductor substrate of GaSb or closely related material. The device can also comprise epitaxial heterostructures of InAs, GaAs, AlSb, and related alloys forming light emitting structures cascaded by tunnel junctions. Further, the device can comprise light emission from the front, epitaxial side of the substrate.

公开(公告)号：US10007823B2

公开(公告)日：2018-06-26

申请号：US15786014

申请日：2017-10-17

Applicant: Analog Devices, Inc.

Inventor： Shrenik Deliwala ,  Alain Valentin Guery

IPC: G06K7/14 ,  G06K7/10 ,  G01N33/66 ,  G06K19/06

CPC classification number: G06K7/10732 ,  A61B5/00 ,  A61B5/0059 ,  A61B5/14532 ,  A61B5/15003 ,  A61B5/150358 ,  A61B5/157 ,  A61B2562/0295 ,  A61B2562/08 ,  G01N33/66 ,  G06K7/10722 ,  G06K7/10821 ,  G06K7/1404 ,  G06K19/06018 ,  G06K19/06037

Abstract: Embodiments of the present disclosure provide code readers for reading codes provided as patterns imprinted on objects. Light interacts with a pattern by e.g. being reflected from or transmitted through the pattern, and at least some of the light that has interacted with the pattern is incident on photosensitive element(s) of one or more photodetectors of a code reader. The code reader employs centroid-measuring photodetector(s), i.e. photodetectors that detect light in such a manner that centroid of a pattern can be obtained directly from the photocurrents generated as a result of the photosensitive elements detecting light incident thereon. The code reader is then configured to process the detected light to determine a centroid of the pattern from the detected light and to decode data encoded in the pattern based on a position of the centroid. Such code readers are substantially less complex than camera-based devices and avoid mechanical scanning.

公开(公告)号：US09923060B2

公开(公告)日：2018-03-20

申请号：US15165122

申请日：2016-05-26

Applicant: Analog Devices, Inc.

Inventor： Shrenik Deliwala ,  James Fiorenza ,  Donghyun Jin

IPC: H01L29/20 ,  H01L21/02 ,  H01L21/322 ,  H01L21/324 ,  H01L21/205 ,  H01L21/268 ,  H01L29/15 ,  H01L29/205 ,  H01L29/778

CPC classification number: H01L29/155 ,  H01L21/02381 ,  H01L21/02458 ,  H01L21/02507 ,  H01L21/0254 ,  H01L21/02686 ,  H01L21/3221 ,  H01L21/324 ,  H01L29/2003 ,  H01L29/205 ,  H01L29/7787

Abstract: A method cold-melts a high conductivity region between a high-resistivity silicon substrate and a gallium-nitride layer to form a trap rich region that substantially immobilizes charge carriers in that region. Such a process should substantially mitigate the parasitic impact of that region on circuits formed at least in part by the gallium-nitride layer.

公开(公告)号：US20170261427A1

公开(公告)日：2017-09-14

申请号：US15068824

申请日：2016-03-14

Applicant: ANALOG DEVICES, INC.

Inventor： Shrenik Deliwala

IPC: G01N21/3577 ,  G01N33/18

CPC classification number: G01N21/3577 ,  G01J3/0256 ,  G01J3/0262 ,  G01J3/0264 ,  G01J3/10 ,  G01J3/36 ,  G01J3/427 ,  G01J2003/1213 ,  G01N33/18 ,  G01N2201/0627

Abstract: Techniques for optical detection of target chemicals on/in samples are disclosed. Light of at least two different wavelengths, or different bands of wavelengths, interacts with a target chemical, and at least some of the light that has interacted with the target chemical is incident on at least two photodetectors. Each of the photodetectors is configured to detect light of a different wavelength, or a different band of wavelengths, that has interacted with the target chemical. A processing logic is configured to compute a ratio between a parameter indicative of the intensity of light detected by one photodetector and a parameter indicative of the intensity of light detected by the other photodetector, and to determine the presence and/or the amount of the target chemical based on the computed ratio. In this manner, a simple, compact, and non-contact optical measurement assembly for assessing chemical content using differential spectral measurements may be provided.