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公开(公告)号：US20240060875A1
公开(公告)日：2024-02-22
申请号：US17890016
申请日：2022-08-17
Applicant: InvenSense, Inc.
Inventor： Jeremy Parker , Nishit Goel , Stephen Bart
CPC classification number: G01N21/1702 , B81B7/02 , G01N2021/1704 , G01N2201/1218 , B81B2203/0127
Abstract: A bi-directional photoacoustic gas sensor includes a first photoacoustic cell, where an electromagnetic radiation source emits radiation to interact with an external gas and generate pressure waves that are detected by a MEMS diaphragm. A second photoacoustic cell has an interior volume and acoustic compliance that corresponds to the interior volume and acoustic compliance of the first photoacoustic cell. Processing circuitry within a substrate uses a first acoustic signal, received by the first photoacoustic cell, and a second acoustic signal, received by the second photoacoustic cell, to determine a bi-directional response of the gas sensor to remove noise and improve the sensor's signal-to-noise ratio.
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公开(公告)号：US20240048249A1
公开(公告)日：2024-02-08
申请号：US18360463
申请日：2023-07-27
Applicant: INVENSENSE, INC.
Inventor： Jeremy Parker , Stephen Bart
IPC: H04B11/00
CPC classification number: H04B11/00
Abstract: Utilization of microphone ultrasonic response is described. A system, comprising: a microelectromechanical system (MEMS) microphone device configured to capture signal data representing an ultrasonic signal and an audio-band signal simultaneously, and a processing circuitry configured to adjust a configuration parameter associated with the MEMS microphone device based on the ultrasonic signal.
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Patent Agency Ranking
公开(公告)号：US12287280B2
公开(公告)日：2025-04-29
申请号：US17890016
申请日：2022-08-17
Applicant: InvenSense, Inc.
Inventor： Jeremy Parker , Nishit Goel , Stephen Bart
Abstract: A bi-directional photoacoustic gas sensor includes a first photoacoustic cell, where an electromagnetic radiation source emits radiation to interact with an external gas and generate pressure waves that are detected by a MEMS diaphragm. A second photoacoustic cell has an interior volume and acoustic compliance that corresponds to the interior volume and acoustic compliance of the first photoacoustic cell. Processing circuitry within a substrate uses a first acoustic signal, received by the first photoacoustic cell, and a second acoustic signal, received by the second photoacoustic cell, to determine a bi-directional response of the gas sensor to remove noise and improve the sensor's signal-to-noise ratio.
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4.发明授权公开(公告)号：US11990917B2
公开(公告)日：2024-05-21
申请号：US17805761
申请日：2022-06-07
Applicant: INVENSENSE, INC.
Inventor： Omid Oliaei , Stephen Bart
CPC classification number: H03M1/462 , H03M1/008 , H03M1/0604 , H03M1/0626 , H03M1/122
Abstract: The present invention relates to an incremental analog to digital converter incorporating noise shaping and residual error quantization. In one embodiment, a circuit includes an incremental analog to digital converter, comprising a loop filter that filters an analog input signal in response to receiving a reset signal, resulting in a filtered analog input signal, and a successive approximation register (SAR) quantizer, coupled with the filtered analog input signal, that converts the filtered analog input signal to an intermediate digitized output of a first resolution based on a reference voltage, wherein the SAR quantizer comprises a feedback loop that shapes quantization noise generated by the SAR quantizer as a result of converting the filtered analog input signal; and a digital filter, coupled with the intermediate digitized output, that generates a digitized output signal of a second resolution, greater than the first resolution, by digitally filtering the intermediate digitized output.
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公开(公告)号：US20210132014A1
公开(公告)日：2021-05-06
申请号：US16672738
申请日：2019-11-04
Applicant: INVENSENSE, INC.
Inventor： Nishit Goel , Stephen Bart
IPC: G01N33/00
Abstract: A gas sensor may include a plurality of elements that are responsive to particular gases based at least in part on the temperature of the temperature sensitive element. A first of the elements may be a gas detection element heated to a temperature at which it is responsive to a gas of interest. A plurality of additional elements may be configured in a reference element network and heated to a temperature at which they are not responsive to the gas of interest but are instead responsive to other effects such as humidity. The reference element network output may be used to remove the other effects (e.g., humidity) from the gas detection element output.
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6.发明公开公开(公告)号：US20230396262A1
公开(公告)日：2023-12-07
申请号：US17805761
申请日：2022-06-07
Applicant: INVENSENSE, INC.
Inventor： Omid Oliaei , Stephen Bart
CPC classification number: H03M1/462 , H03M1/0626 , H03M1/122 , H03M1/008 , H03M1/0604
Abstract: The present invention relates to an incremental analog to digital converter incorporating noise shaping and residual error quantization. In one embodiment, a circuit includes an incremental analog to digital converter, comprising a loop filter that filters an analog input signal in response to receiving a reset signal, resulting in a filtered analog input signal, and a successive approximation register (SAR) quantizer, coupled with the filtered analog input signal, that converts the filtered analog input signal to an intermediate digitized output of a first resolution based on a reference voltage, wherein the SAR quantizer comprises a feedback loop that shapes quantization noise generated by the SAR quantizer as a result of converting the filtered analog input signal; and a digital filter, coupled with the intermediate digitized output, that generates a digitized output signal of a second resolution, greater than the first resolution, by digitally filtering the intermediate digitized output.
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公开(公告)号：US11162928B2
公开(公告)日：2021-11-02
申请号：US16672738
申请日：2019-11-04
Applicant: INVENSENSE, INC.
Inventor： Nishit Goel , Stephen Bart
IPC: G01N33/00
Abstract: A gas sensor may include a plurality of elements that are responsive to particular gases based at least in part on the temperature of the temperature sensitive element. A first of the elements may be a gas detection element heated to a temperature at which it is responsive to a gas of interest. A plurality of additional elements may be configured in a reference element network and heated to a temperature at which they are not responsive to the gas of interest but are instead responsive to other effects such as humidity. The reference element network output may be used to remove the other effects (e.g., humidity) from the gas detection element output.
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