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MLCC howling noise elimination device and notebook computer

A noise and circuit technology, applied in the computer field, can solve problems such as no effective solution, affect user experience, etc., and achieve the effect of eliminating howling noise

Pending Publication Date: 2022-03-04
GUANGDONG INSPUR BIG DATA RES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This will seriously affect the user experience when using the laptop
At present, there is no more effective solution to the above technical problems.

Method used

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  • MLCC howling noise elimination device and notebook computer
  • MLCC howling noise elimination device and notebook computer
  • MLCC howling noise elimination device and notebook computer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0034] See image 3 , image 3 It is a structural diagram of another MLCC howling noise elimination device provided by the embodiment of the present invention. As a preferred implementation manner, the buck circuit includes: a first switching tube K1, a second switching tube K2 and an inductor L;

[0035] Wherein, the control end of the first switch tube K1 is connected to the HG pin of the power chip, and the second end of the first switch is respectively connected to the PH pin of the power chip, the first end of the second switch tube K2 and the first end of the inductor L. terminal, the control terminal of the second switching tube K2 is connected to the LG pin of the power chip, and the second terminal of the second switching tube K2 is grounded;

[0036] Correspondingly, the first end of the first switch tube K1 is the input end of the buck circuit, and the second end of the inductor L is the output end of the buck circuit.

[0037] In this embodiment, a specific arra...

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Abstract

The invention discloses an MLCC howling noise elimination device, which comprises a main board, a power supply chip and a voltage conversion circuit connected with the power supply chip are arranged on the main board, and the input end and the output end of the voltage conversion circuit are both provided with an even number of MLCCs which have the same specification and are arranged on the surface layer and the bottom layer of the main board in a mirror symmetry manner. The input end and the output end of the voltage conversion circuit are respectively provided with an even number of MLCCs which have the same specification and are arranged on the surface layer and the bottom layer of the mainboard in a mirror symmetry manner, so that when an electric field acts on the MLCCs, the MLCCs arranged on the surface layer and the bottom layer of the mainboard can generate the same deformation, and a group of mutually counteracted deformation forces are generated on the mainboard. Therefore, through the elimination device provided by the invention, the howling noise generated by the MLCC and the mainboard under the resonance condition can be eliminated. Correspondingly, the notebook computer provided by the invention also has the above beneficial effects.

Description

technical field [0001] The invention relates to the technical field of computers, in particular to an MLCC howling noise elimination device and a notebook computer. Background technique [0002] At present, due to cost and appearance considerations, the capacitors on the motherboard of the notebook computer are generally selected as MLCCs (Multi-Layer Ceramic Capacitors, chip multilayer ceramic capacitors), wherein MLCCs have an electrostrictive effect, that is, Under the action of electric field, MLCC will produce mechanical deformation along the direction of electric field. Since the MLCC is fixed on the main board, the MLCC will drive the main board to vibrate under the action of the electric field. If the mechanical deformation generated by the MLCC resonates with the main board, and the vibration period is within the vibration range (20Hz-20KHz) that can be distinguished by the human ear, howling noise will be generated. This will seriously affect the user experience ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F1/16G06F1/26H02M1/00H02M3/158
CPCG06F1/1656G06F1/26H02M1/00H02M3/158Y02D10/00
Inventor 王玉
Owner GUANGDONG INSPUR BIG DATA RES CO LTD
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