CN-115134988-B - Electronic circuit and circuit board

Abstract

The invention provides an electronic circuit and a circuit board, which are miniaturized by utilizing the interaction between adjacent arranged structures. The electronic circuit includes a plurality of individual electronic circuits arranged, each of which includes a 1 st conductor post connected to a ground line of a 1 st layer of any one of the plurality of conductor layers stacked in order in a separated state and extending in a stacking direction, a conductor line connected to the conductor post in a2 nd layer of any one of the plurality of conductor layers different from the 1 st layer and extending in a band shape and having an open end at an end remote from the conductor post, and a2 nd conductor post connected to the conductor line but not connected to the ground line and extending in the stacking direction, each of the 1 st and 2 nd individual electronic circuits adjacent to each other of the plurality of individual electronic circuits having at least one pair of 2 nd conductor posts formed at positions adjacent to each other without the conductor line of any one of the 1 st and 2 nd individual electronic circuits interposed therebetween.

Inventors

• DAISUKE HORIKAWA

Assignees

• 富士胶片商业创新有限公司

Dates

Publication Date

20260505

Application Date

20210902

Priority Date

20210324

Claims (5)

1. 1. An electronic circuit having an arrangement of a plurality of individual electronic circuits, each of the plurality of individual electronic circuits having: A1 st conductor pillar connected to the ground line of the 1 st layer of any one of the plurality of conductor layers sequentially stacked in a separated state and extending in the stacking direction; A conductor line connected to the conductor post in a 2 nd layer different from the 1 st layer of any one of the plurality of conductor layers and extending in a band shape and having an open end open at an end far from the conductor post, and A2 nd conductor post connected to the conductor line but not connected to the ground line and extending in the stacking direction, Each of the 1 st and 2 nd independent electronic circuits adjacent to each other of the plurality of independent electronic circuits has at least one pair of the 2 nd conductor posts formed at a position adjacent to each other without the conductor line of any one of the 1 st and 2 nd independent electronic circuits interposed therebetween.
2. 2. The electronic circuit of claim 1, wherein the electronic circuit comprises a plurality of capacitors, At least one of the plurality of independent electronic circuits is a circuit that suppresses electromagnetic wave noise of the same frequency.
3. 3. An electronic circuit according to claim 2, characterized in that, The conductor lines of each of the plurality of independent electronic circuits are lines connected to the conductor post at different ends from the open ends of the conductor lines.
4. 4. An electronic circuit according to claim 3, characterized in that, The conductor line is a line extending while continuously or intermittently bending in the same rotational direction from one end portion toward the other end portion.
5. 5. A circuit board on which the electronic circuit according to any one of claims 1 to 4 is mounted.

Description

Electronic circuit and circuit board Technical Field The present invention relates to an electronic circuit and a circuit board. Background There is known a technique for suppressing propagation of electromagnetic wave noise by an EBG structure (Electromagnetic Band Gap Structure: electromagnetic bandgap structure) formed on a circuit board. The EBG structure requires a wide area on a circuit board, and a plurality of the same structures are arranged, so that miniaturization thereof is one of the problems. For example, patent document 1 proposes an EBG structure in which conductor lines having a two-layer spiral shape are formed and connected by vias, thereby achieving miniaturization. Patent document 2 proposes an EBG structure in which a 3 rd layer is formed in addition to a layer on which a conductor line is formed and a ground layer, thereby achieving miniaturization. Patent document 1 Japanese patent laid-open publication 2016-134809 Patent document 2 Japanese patent application laid-open No. 2013-255259 Disclosure of Invention The invention provides an electronic circuit and a circuit board which are miniaturized by utilizing interaction between adjacent arranged structures. The invention according to claim 1 is an electronic circuit, characterized in that, Having a plurality of individual electronic circuits arranged, each of the plurality of individual electronic circuits having: A1 st conductor pillar connected to the ground line of the 1 st layer of any one of the plurality of conductor layers sequentially stacked in a separated state and extending in the stacking direction; a conductor line connected to the conductor post in a2 nd layer different from the 1 st layer of any one of the plurality of conductor layers and extending in a band shape and having an open end open at an end far from the conductor post, and A2 nd conductor post connected to the conductor line but not connected to the ground line and extending in the stacking direction, Each of the 1 st and 2 nd independent electronic circuits adjacent to each other of the plurality of independent electronic circuits has at least one pair of the 2 nd conductor posts formed at a position adjacent to each other without sandwiching the conductor line of any one of the 1 st and 2 nd independent electronic circuits therebetween. The invention according to claim 2 is the electronic circuit according to claim 1, wherein at least one of the plurality of independent electronic circuits is a circuit that suppresses electromagnetic wave noise of the same frequency. An invention according to claim 3 is the electronic circuit according to claim 2, wherein the conductor line of each of the plurality of independent electronic circuits is a line connected to the conductor post at a different end from the open end of the conductor line. An invention according to claim 4 is the electronic circuit according to claim 3, wherein the conductor line is a line extending while continuously or intermittently bending in the same rotational direction from one end portion toward the other end portion. The invention according to claim 5 is a circuit board on which the electronic circuit according to any one of claims 1 to 4 is mounted. Effects of the invention According to the electronic circuits of the 1 st and 2 nd aspects of the present invention and the circuit board of the 5 th aspect of the present invention, miniaturization is achieved. According to the electronic circuit of claim 3 of the present invention, the frequency band in which the propagation of electromagnetic wave noise is suppressed can be reduced to the maximum extent in the case of the same conductor line length. According to the electronic component of claim 4, the electronic component can be miniaturized as compared with a shape other than the scroll shape. Drawings Embodiments of the present invention will be described in detail with reference to the following drawings. Fig. 1 is a schematic diagram showing an example of a circuit constituting one unit of a conventional EBG structure; Fig. 2 is a diagram showing a distributed constant circuit which is an equivalent circuit of the EBG structure; Fig. 3 is a graph showing frequency characteristics of admittance Y; fig. 4 is a diagram schematically showing transmission characteristics with respect to frequency; FIG. 5 is a schematic diagram showing EBG structures of various shapes; Fig. 6 is a diagram showing a circuit which is one unit of an EBG structure constituting an electronic circuit according to embodiment 1 of the present invention; Fig. 7 is a schematic diagram showing an EBG structure in which four circuits of one unit shown in fig. 6 are arranged; Fig. 8 is a diagram showing a distributed constant circuit which is an equivalent circuit of the EBG structure when a via functioning as a capacitor is added; fig. 9 is an explanatory diagram of an effect of adding a pair of vias adjacent to each other between unit circuits adjacent to each other