公开(公告)号：US11726105B2

公开(公告)日：2023-08-15

申请号：US16900185

申请日：2020-06-12

Applicant: QUALCOMM Technologies, Inc.

Inventor： Robert J. Littrell

IPC: G01P15/09 ,  G01P1/00 ,  H10N30/30 ,  H04R19/04 ,  H04R17/00

CPC classification number: G01P15/09 ,  G01P1/00 ,  H04R17/00 ,  H04R19/04 ,  H10N30/302 ,  H10N30/306 ,  H04R2201/003

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.

公开(公告)号：US11930334B2

公开(公告)日：2024-03-12

申请号：US17819855

申请日：2022-08-15

Applicant: Qualcomm Technologies Inc.

Inventor： Robert J. Littrell ,  Michael Carfore ,  Shuwan Xue

IPC: H04R3/00 ,  G01R19/02 ,  H04R3/06 ,  H04R17/02 ,  H10N30/30 ,  H10N30/80

CPC classification number: H04R3/06 ,  G01R19/02 ,  H04R17/02 ,  H10N30/302 ,  H10N30/802 ,  H04R2201/003

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.

公开(公告)号：US11716906B2

公开(公告)日：2023-08-01

申请号：US17567719

申请日：2022-01-03

Applicant: Qualcomm Technologies Inc.

Inventor： Robert J. Littrell

IPC: H01L41/083 ,  H10N30/50 ,  H10N30/05 ,  H10N30/076 ,  H10N30/80 ,  H10N30/30 ,  B81B3/00 ,  B81C1/00 ,  C23C14/06 ,  C23C14/14 ,  C23C14/34 ,  C23C14/54 ,  H04R7/06 ,  H04R17/02 ,  H04R31/00

CPC classification number: H10N30/508 ,  B81B3/0072 ,  B81C1/00666 ,  C23C14/0641 ,  C23C14/14 ,  C23C14/34 ,  C23C14/542 ,  H04R7/06 ,  H04R17/02 ,  H04R31/003 ,  H10N30/05 ,  H10N30/076 ,  H10N30/306 ,  H10N30/50 ,  H10N30/80 ,  B81B2201/0257 ,  B81B2203/0118 ,  B81C2201/017

Abstract: A transducer includes a first piezoelectric layer; and a second piezoelectric layer that is above the first piezoelectric layer; wherein the second piezoelectric layer is a more compressive layer with an average stress that is less than or more compressive than an average stress of the first piezoelectric layer.