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Self-damping mlcc array

A technology of electronic components and traces, applied in the field of multilayer ceramic capacitors, which can solve the problems of microphone noise addition, harmonic generation, noise generation, etc.

Active Publication Date: 2019-09-17
KEMET ELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although with some success, structural techniques designed to minimize the transfer of vibrational energy did not eliminate the generation of microphone noise, so the problem was not fully resolved
When multiple units are in phase, the microphone noise can add, or it can create harmonics, so even though the transfer is attenuated, there is still noise

Method used

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Embodiment Construction

[0029] The present invention relates to an improved MLCC array, and an electronic device comprising said array, wherein at least one MLCC is mounted to a substrate, and the MLCC has self-attenuating properties against microphone noise, wherein the MLCC has a A first capacitive electrode and a second capacitive electrode in a second electrical phase, wherein the first phase is sufficiently out of phase with the second phase to suppress and preferably cancel microphone noise through noise cancellation.

[0030] It is known in the art that MLCCs include capacitive couplings comprising multiple conductive layers with a dielectric in between, wherein alternating layers are terminated to external terminations of opposite polarity. In one embodiment of the present invention, the self-attenuating MLCC includes a first capacitive coupler (first capacitive couple) and a second capacitive coupler, wherein the first capacitive coupler and the second capacitive coupler have different electr...

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Abstract

An electronic component with a self-damping MLCC is provided. The electronic component comprises a pulse signal generator and a substrate comprising first traces and second traces. An MLCC is provided comprising a first capacitive couple between two first external terminations and a second capacitive couple between two second external terminations wherein each first external termination is in electrical contact with a different first trace and each second external termination is in electrical contact with a different second trace. The pulse signal generator provides a first pulse to the first traces and a second pulse to the second traces wherein the first pulse and second pulse are not in phase.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to pending U.S. Provisional Patent Application No. 62 / 450,173, filed January 25, 2017, which is hereby incorporated by reference. technical field [0003] The present invention relates to a multilayer ceramic capacitor (MLCC) mounted on a substrate, wherein the MLCC provides self-damping characteristics. More specifically, the present invention relates to an MLCC or an array of MLCCs in a circuit, wherein the elements of the MLCC are out of electrical phase, thereby achieving attenuation of microphone noise. Background technique [0004] MLCCs fabricated with polarized dielectrics such as barium titanate are prone to microphone noise. Microphone noise is believed to be caused by electrostrictive and piezoelectric effects, which are related to the motion of ceramics that occurs in the presence of an applied electric field. When an electric field is applied, ceramic motion can be transf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G4/12H01G4/30H01G4/232H01G4/005H03K3/335
CPCH04R3/00H04R2410/03H01G2/065H01G4/012H01G4/12H01G4/232H01G4/30H01G4/38H04R3/04H01G4/228H01G4/1209
Inventor 兰道尔·J·瓦格翰阿比吉特·古拉夫格雷戈里·L·克罗斯比徐步力
Owner KEMET ELECTRONICS CORP
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