Laminated type EMI filter
A filter and chip technology, which is applied in the direction of impedance network, electrical components, single-ended pair network, etc., can solve the problems of unshielded, large size, and inability to meet the better characteristics of medium and high frequencies at the same time, so as to meet the requirements of medium frequency insertion loss and High-frequency insertion loss, guaranteed miniaturization effect
Active Publication Date: 2014-09-03
SHENZHEN ZHENHUA FU ELECTRONICS
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[0006] The purpose of the present invention is to provide a laminated chip EMI filter, which aims to solve the problem that the chip EMI filter in the prior art is too large, has no shielding characteristics, and cannot satisfy the better characteristics of medium and high frequencies at the same time
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[0013] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0014] Such as Figure 1~4 Shown is a preferred embodiment provided by the present invention.
[0015] Such as figure 1 As shown, the multilayer chip EMI filter 1 in the present invention includes a structural body, the structural body includes multiple layers of electronic components stacked in sequence, and the multi-layer electronic components include a first electronic component that is electrically connected to an external input line. A ferrite inductor 12, a first ceramic inductor 13, a ceramic capacitor 14 connected to an external ground wire, a second ceramic inductor 15, and a second fer...
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The invention relates to the technical field of filters, and discloses a laminated type EMI filter. The laminated type EMI filter comprises a structural main body, the structural main body comprises multilayered sequentially-stacked electronic components, the multilayered electronic components includes a first ferrite inductor, a first ceramic inductor, a ceramic capacitor, a second ceramic inductor which are electrically connected with an external input line, and a second ferrite inductor electrically connected with an external output line, the ceramic capacitor comprises a first capacitor electrode and a second capacitor electrode which is electrically connected with an external ground wire, the first ferrite inductor, the first ceramic inductor, the first capacitor electrode, the second ceramic inductor and the second ferrite inductor are sequentially and electrically connected in series, and a ferrite upper cover and a ferrite lower cover are stacked on upper end lower ends of the structural main body respectively. The laminated type EMI filter in the invention is provided with the two ferrite inductors for loss of intermediate frequency signal noise, an LC circuit consisting of the two ceramic inductors and the ceramic capacitor is used for loss of high frequency signal noise, and thus on the basis of miniaturization of the components, intermediate frequency and high frequency insertion loss requirements can be satisfied.
Description
technical field [0001] The invention relates to the technical field of EMI filters, in particular to a laminated chip EMI filter. Background technique [0002] With the development of electronic technology, more and more electronic devices appear in the environment of people's life and production. A large number of electronic devices will generate high-density, wide-spectrum electromagnetic signals during work, forming a complex electromagnetic environment. The complex electromagnetic environment requires electronic equipment and power supplies to have higher electromagnetic compatibility, so more and more attention has been paid to the technology of suppressing electromagnetic interference. [0003] Chip EMI filter is a combined component commonly used to suppress electromagnetic noise. It can effectively shield electromagnetic interference, improve the anti-interference ability and system reliability of electronic equipment. [0004] The chip EMI filter in the prior art...
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IPC IPC(8): H03H5/00
Inventor 马国超刘季超李建辉樊应县张华良税莎王智会
Owner SHENZHEN ZHENHUA FU ELECTRONICS