-
公开(公告)号：US10566517B1
公开(公告)日：2020-02-18
申请号：US14851560
申请日：2015-09-11
发明人： Robert J. Littrell , Karl Grosh
IPC分类号： H01L41/083 , H01L41/047 , B06B1/06 , H01L21/02
摘要： A transducer comprising: at least one piezoelectric layer; a first patterned conductive layer that is patterned with a first opening; a second patterned conductive layer that is patterned with a second opening; wherein at least one piezoelectric layer is between the first and the second patterned conductive layers in a stack; and wherein a position of the first opening is staggered relative to a position of the second opening in the stack to mitigate an occurrence of crack propagation through the layers.
-
公开(公告)号：US20190289405A1
公开(公告)日：2019-09-19
申请号：US16353589
申请日：2019-03-14
发明人： Robert Littrell , Ronald Gagnon
摘要： 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.
-
公开(公告)号：US20190110132A1
公开(公告)日：2019-04-11
申请号：US15760868
申请日：2016-09-19
发明人： Robert J Littrell
摘要： A transducer and method for processing a MEMS transducer. In one aspect, the MEMS transducer includes a first plate and a second plate. The MEMS transducer can also include a spring substantially between the first plate and the second plate, the spring including first and second spring arms dimensioned to decrease vertical deflection mismatch between the first and second plates, relative to vertical deflection mismatch of the first and second plates independent of the spring.
-
44.发明申请公开(公告)号：US20190098417A1
公开(公告)日：2019-03-28
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.
-
公开(公告)号：US20170150248A1
公开(公告)日：2017-05-25
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.
-
-
-
-
搜索结果
45 条记录 (耗时 0.016 秒)
