Patent Application
20160366764
The subject matter herein generally relates to circuit boards.
A multi-layer ceramic capacitors (MLCC) is mounted in a circuit board and is surrounded by an electronic field, the MLCC may be elastically deformed by the electronic field when operating which will makes the MLCC strike the circuit board and generate noise.
Implementations of the present technology will now be described, by way of example only, with reference to the attached figures.
It will be appreciated that for simplicity and clarity of illustration, where appropriate, reference numerals have been repeated among the different figures to indicate corresponding or analogous elements. In addition, numerous specific details are set forth in order to provide a thorough understanding of the embodiments described herein. However, it will be understood by those of ordinary skill in the art that the embodiments described herein can be practiced without these specific details. In other instances, components have not been described in detail so as not to obscure the related relevant feature being described. Also, the description is not to be considered as limiting the scope of the embodiments described herein. The drawings are not necessarily to scale and the proportions of certain parts may be exaggerated to better illustrate details and features of the present disclosure.
Several definitions that apply throughout this disclosure will now be presented.
The term “coupled” is defined as connected, whether directly or indirectly through intervening components, and is not necessarily limited to physical connections. The connection can be such that the objects are permanently connected or releasably connected. The term “comprising,” when utilized, means “including, but not necessarily limited to”; it specifically indicates open-ended inclusion or membership in the so-described combination, group, series, and the like.
The present disclosure is described in relation to a circuit board which prevents noise.
In at least one embodiment, each of the first capacitor 20 and the second capacitor 30 is a multi-layer ceramic capacitors (MLCC) and is ferroelectric.
When in assembly, the circuit board body 10 is placed on a desk (not shown) parallel to a plane 40. The first terminal portion 21 is mounted in the first mounting portion 15. The second terminal portion 23 is mounted in the second mounting portion 16. The third terminal portion 31 is mounted in the third mounting portion 17. The fourth terminal portion 33 is mounted in the fourth mounting portion 18. The first side portion 11 and the second side portion 13 are parallel to the plane 40.
In at least one embodiment, the first terminal portion 21 is an anode terminal portion, the second terminal portion 23 is a cathode terminal portion, the third terminal portion 31 is an anode terminal portion, and the fourth terminal portion 33 is a cathode terminal portion. In the other embodiment, the first terminal portion 21 is a cathode terminal portion, the second terminal portion 23 is an anode terminal portion, the third terminal portion 31 is a cathode terminal portion, and the fourth terminal portion 33 is an anode terminal portion.
The circuit board body 10 is surrounded by an electronic field. The first capacitor 20 and the second capacitor 30 are also surrounded by the electronic field. The first capacitor 20 alternately generates a first force and a second force to strike the circuit board body 10. The second capacitor 30 alternately generates a third force and a fourth force to strike the circuit board body 10. The first force and the fourth force are in a first direction A. The second force and the third are in a second direction B. The first direction A and the second direction B are perpendicular to the plane 40. The first direction A is opposite to the second direction B. The first force is equal to the second force, the third force, and the fourth force. When the first force is exerted on the circuit board body 10, the third force is exerted on the circuit board body 10. The first force and the third force are equilibrants. The first force and the third force are exerted on the circuit board body 10, thus avoiding noise. When the second force is exerted on the circuit board body 10, the fourth force is exerted on the circuit board body 10. The second force and the fourth force are equilibrants. The second force and the fourth force are exerted on the circuit board body 10, thus preventing noise.
In at least one embodiment, when the first capacitor 20 and the second capacitor 30 are charged, a current flows to the second terminal portion 23 from the first terminal portion 21, the current flows to the fourth terminal portion 33 from the third terminal portion 31. The first capacitor 20 alternately generates a first force in the first direction A and a second force in the second direction B to strike the circuit board body 10. The second capacitor 30 alternately generates a third force in the second direction B and a fourth force in the first direction A to strike the circuit board body 10. When the first capacitor 20 and the second capacitor 30 are discharged, a first current via the first capacitor 20 flows to the first terminal portion 21 from the second terminal portion 23. A second current via the second capacitor 30 flows to the third terminal portion 31 from the fourth terminal portion 33. The first capacitor 20 alternately generates a first force in the second direction B and a second force in the first direction A to the circuit board body 10. The second capacitor 30 alternately generates a third force in the first direction A and a fourth force in the second direction B to strike the circuit board body 10. When the first force is exerted on the circuit board body 10, the third force is exerted on the circuit board body 10. When the first the second force is exerted on the circuit board body 10, the fourth force is exerted on the circuit board body 10. The first force and the third force are equilibrants. The first force and the third force are exerted on the circuit board body 10, thus avoiding noise when the force from the first capacitor 20 and the second capacitor 30 strike the circuit board body 10. The second force and the fourth force are equilibrants. The second force and the fourth force are exerted on the circuit board body 10, thus avoiding noise when the force from the first capacitor 20 and the second capacitor 30 strike the circuit board body 10.
It is to be understood that even though numerous characteristics and advantages have been set forth in the foregoing description of embodiments, together with details of the structures and functions of the embodiments, the disclosure is illustrative only and changes may be made in detail, including in the matters of shape, size, and arrangement of parts within the principles of the disclosure to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201510310802.7 | Jun 2015 | CN | national |
