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公开(公告)号：US20220360894A1
公开(公告)日：2022-11-10
申请号：US17741215
申请日：2022-05-10
Applicant: Vesper Technologies, Inc.
Inventor： Michael Carfore , Tomer Saraf
IPC: H04R3/00 , H01L41/113
Abstract: Illustrative embodiments enable a MEMS transducer to quickly recover from, acoustic overload events by quickly resetting signal processing circuitry downstream from a MEMS transducer. An acoustic overload sensor detects occurrence of an acoustic overload event, and triggers a reset circuit to operate a set of switches to rapidly drain charge from a corresponding set of capacitances within the transducer, or within the signal processing circuitry, thereby resetting the signal processing circuitry more rapidly than would occur if said transducer or circuitry were allowed to recover on its own.
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公开(公告)号：US20220317148A1
公开(公告)日：2022-10-06
申请号：US17807310
申请日：2022-06-16
Applicant: Vesper Technologies Inc.
Inventor： Robert J. Littrell
Abstract: A sensor device that senses proper acceleration. The sensor device includes a substrate, a spacer layer supported over a first surface of the substrate, at least a first tapered cantilever beam element having a base and a tip, the base attached to the spacer layer, and which is supported over and spaced from the substrate by the spacer layer. The at least first tapered cantilever beam element tapers in width from the base portion to the tip portion. The at least first cantilever beam element further including at least a first layer comprised of a piezoelectric material, a pair of electrically conductive layers disposed on opposing surfaces of the first layer, and a mass supported at the tip portion of the at least first tapered cantilever beam element.
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公开(公告)号：US11228843B2
公开(公告)日：2022-01-18
申请号：US16334678
申请日：2017-10-06
Applicant: Vesper Technologies Inc.
Inventor： Ronald Gagnon , Chen-Wei Huang
Abstract: A device includes: a piezoelectric transducer; a field effect transistor (FET) configured to provide a sub-threshold conduction path for leakage current across the piezoelectric transducer; wherein the FET comprises a gate; wherein each of a width and a length of the gate has a size in accordance with the sub-threshold conduction path being configured to substantially maintain an input voltage to the piezoelectric transducer across a path of the leakage current of the piezoelectric transducer.
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公开(公告)号：US20210360347A1
公开(公告)日：2021-11-18
申请号：US17318980
申请日：2021-05-12
Applicant: Vesper Technologies, Inc.
Inventor： Julian Aschieri
Abstract: A transducer system has a transducer configured to receive an incident signal and produce an output signal as a function of the incident signal. As known in the art, the output signal has a −3 dB point. The transducer system also has circuitry operatively coupled with the transducer. The circuitry includes an amplifier with an output configured to produce an amplified signal as a function of the output signal. In addition, the circuitry further has a positive feedback loop and a negative feedback loop that both are electrically coupled between the transducer and the amplifier. The positive feedback loop is configured to move the −3 dB point in a first frequency direction. Conversely, the negative feedback loop is configured to move the −3 dB point in a second frequency direction. Preferably, the first and second frequency directions are different.
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公开(公告)号：US10917727B2
公开(公告)日：2021-02-09
申请号：US16353589
申请日：2019-03-14
Applicant: Vesper Technologies, Inc.
Inventor： Robert Littrell , Ronald Gagnon
Abstract: A MEMS transducer system has a transducer configured to convert a received signal into an output signal for forwarding by a transducer output port, and an integrated circuit having an IC input in communication with the transducer output port. The IC input is configured to receive an IC input signal produced as a function of the output signal. The system also has a dividing element coupled between the IC input and the transducer output port. The dividing element is configured to selectively attenuate one or more signals into the IC input to at least in part produce the IC input signal. Other implementations may couple a feedback loop to the ground of the transducer (similar to bootstrapping), or pick off voltages at specific portions of the transducer.
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Patent Agency Ranking
36.发明申请公开(公告)号：US20200296513A1
公开(公告)日：2020-09-17
申请号：US16819665
申请日：2020-03-16
Applicant: Vesper Technologies Inc.
Inventor： Robert J. Littrell , Michael Carfore , Shuwan Xue
IPC: H04R3/06 , H04R17/02 , G01R19/02 , H01L41/113 , H01L41/04
Abstract: A device that includes an adaptive acoustic detection circuit and an acoustic sensor device such as a microphone is described. The device includes in addition to the sensor a circuit configured to detect when an input stimulus to the sensor satisfies an adaptive threshold, and further configured to produce a signal upon detection that causes adjustment of performance of the device, wherein the adaptive threshold is a threshold value that varies over time in accordance with detected changes to sound of an environment in which the device is located.
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37.发明授权公开(公告)号：US10715922B2
公开(公告)日：2020-07-14
申请号：US16081015
申请日：2017-02-28
Applicant: Vesper Technologies Inc.
Inventor： Robert J. Littrell , Ronald Gagnon , Karl Grosh
Abstract: A device comprising: a sensor; and a first circuit configured to detect when an input stimulus to the sensor satisfies one or more detection criteria, and further configured to produce a signal upon detection that causes adjustment of performance of the device; and a second circuit for processing input following detection, wherein the second circuit is configured to increase its power level following detection, relative to a power level of the second circuit prior to detection.
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公开(公告)号：US11665968B2
公开(公告)日：2023-05-30
申请号：US17180193
申请日：2021-02-19
Inventor： Karl Grosh , Robert J. Littrell
IPC: H01L41/083 , H01L41/187 , H01L41/113 , H04R17/00 , H04R17/02 , B81B7/00 , B81B7/02 , B81B3/00
CPC classification number: H01L41/083 , B81B3/0021 , B81B7/0032 , B81B7/02 , H01L41/1132 , H01L41/1136 , H01L41/1138 , H01L41/187 , H04R17/00 , H04R17/02 , B81B2201/0257 , B81B2203/0127 , B81B2203/0315 , B81B2203/04 , B81B2207/09 , H04R2201/003
Abstract: A microphone including a casing having a front wall, a back wall, and a side wall joining the front wall to the back wall, a transducer mounted to the front wall, the transducer including a substrate and a transducing element, the transducing element having a transducer acoustic compliance dependent on the transducing element dimensions, a back cavity cooperatively defined between the back wall, the side wall, and the transducer, the back cavity having a back cavity acoustic compliance. The transducing element is dimensioned such that the transducing element length matches a predetermined resonant frequency and the transducing element width, thickness, and elasticity produces a transducer acoustic compliance within a given range of the back cavity acoustic compliance.
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公开(公告)号：US20220308084A1
公开(公告)日：2022-09-29
申请号：US17807319
申请日：2022-06-16
Applicant: Vesper Technologies Inc.
Inventor： Robert J. Littrell
Abstract: A sensor device that senses proper acceleration. The sensor device includes a substrate, a spacer layer supported over a first surface of the substrate, at least a first tapered cantilever beam element having a base and a tip, the base attached to the spacer layer, and which is supported over and spaced from the substrate by the spacer layer. The at least first tapered cantilever beam element tapers in width from the base portion to the tip portion. The at least first cantilever beam element further including at least a first layer comprised of a piezoelectric material, a pair of electrically conductive layers disposed on opposing surfaces of the first layer, and a mass supported at the tip portion of the at least first tapered cantilever beam element.
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40.发明授权公开(公告)号：US11418882B2
公开(公告)日：2022-08-16
申请号：US16819665
申请日：2020-03-16
Applicant: Vesper Technologies Inc.
Inventor： Robert J. Littrell , Michael Carfore , Shuwan Xue
Abstract: A device that includes an adaptive acoustic detection circuit and an acoustic sensor device such as a microphone is described. The device includes in addition to the sensor a circuit configured to detect when an input stimulus to the sensor satisfies an adaptive threshold, and further configured to produce a signal upon detection that causes adjustment of performance of the device, wherein the adaptive threshold is a threshold value that varies over time in accordance with detected changes to sound of an environment in which the device is located.
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