-
公开(公告)号：US10771889B2
公开(公告)日：2020-09-08
申请号：US15357075
申请日：2016-11-21
发明人： Robert J. Littrell
摘要： A package comprises: a transducer; a substrate comprising an acoustic port, with the transducer attached to a surface of the substrate and over or adjacent to the acoustic port; and a venting mechanism for venting air or sound pressure from a device comprising the package, with the venting mechanism being affixed to the substrate and partially surrounding the acoustic port, and with the venting mechanism being dimensioned to filter out audio frequencies.
-
公开(公告)号：US20220317148A1
公开(公告)日：2022-10-06
申请号：US17807310
申请日：2022-06-16
发明人： Robert J. Littrell
摘要： 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.
-
3.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
发明人： Robert J. Littrell , Michael Carfore , Shuwan Xue
IPC分类号： H04R3/06 , H04R17/02 , G01R19/02 , H01L41/113 , H01L41/04
摘要： 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.
-
4.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
发明人： Robert J. Littrell , Ronald Gagnon , Karl Grosh
摘要： 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.
-
5.发明申请公开(公告)号：US20220394384A1
公开(公告)日：2022-12-08
申请号：US17819855
申请日：2022-08-15
发明人： Robert J. Littrell , Michael Carfore , Shuwan Xue
IPC分类号： H04R3/06 , H01L41/04 , H01L41/113 , H04R17/02 , G01R19/02
摘要： 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.
-
6.发明授权公开(公告)号：US11259124B2
公开(公告)日：2022-02-22
申请号：US16353934
申请日：2019-03-14
发明人： Karl Grosh , Robert J. Littrell
IPC分类号： H04R17/02 , H04R31/00 , H04R7/06 , H01L41/27 , H01L41/314 , H01L41/332
摘要： A transducer of the preferred embodiment including a transducer and a plurality of adjacent, tapered cantilevered beams. Each of the beams define a beam base, a beam tip, and a beam body disposed between the beam base and the beam tip. The beams are arranged such that each of the beam tips extends toward a common area. Each beam is joined to the substrate along the beam base and is free from the substrate along the beam body. A preferred method of manufacturing a transducer can include: depositing alternating layers of piezoelectric and electrode onto the substrate in block, processing the deposited layers to define cantilever geometry in block, depositing metal traces in block, and releasing the cantilevered beams from the substrate in block.
-
公开(公告)号：US10825982B1
公开(公告)日：2020-11-03
申请号：US14851432
申请日：2015-09-11
发明人： Robert J. Littrell , Karl Grosh , Craig Core , Yu Hui , Wang Kyung Sung
IPC分类号： H01L41/23 , H01L41/113
摘要： A piezoelectric Micro-Electro-Mechanical Systems (MEMS) device comprising: a physical element; and a piezoelectric sensor element, with the physical element positioned in proximity to a moving portion of the piezoelectric sensor element, and with proximity of the physical element to the moving portion reducing a probability of breakage of the piezoelectric sensor element by limiting an excursion of the piezoelectric sensor element, relative to a probability of breakage of the piezoelectric sensor element in another piezoelectric MEMS device without the physical element.
-
8.发明申请公开(公告)号：US20200344555A1
公开(公告)日：2020-10-29
申请号：US15930530
申请日：2020-05-13
发明人： Robert J. Littrell , Ronald Gagnon , Karl Grosh
摘要： 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.
-
公开(公告)号：US20200296530A1
公开(公告)日：2020-09-17
申请号：US16819673
申请日：2020-03-16
发明人： Robert J. Littrell
摘要： An acoustic device is described and includes an acoustic sensor element configured to sense acoustic energy and produce an output signal and a threshold detector circuit including a switch having an input coupled to the output of the acoustic sensor element to receive the output signal, a control port that receives a control signal, and first and second output ports, a first channel including an analog-to-digital converter that operates at a first power level a second analog-to-digital converter that operates at a second higher power level, relative to the first power level and a threshold level detector that receives an output from the first analog-to-digital converter to produce the control signal having a first state that causes the switch feed the output signal from the acoustic sensor element to the second analog-to-digital converter when the first digitized output signal meets a threshold criteria.
-
公开(公告)号：US20200148532A1
公开(公告)日：2020-05-14
申请号：US16196922
申请日：2018-11-20
发明人： Karl Grosh , Robert J. Littrell
摘要： 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.
-
-
-
-
-
-
-
-
-
搜索结果
27 条记录 (耗时 0.011 秒)
