JPH0498810A - Capacitor device - Google Patents

Abstract

PURPOSE:To eliminate the disturbance on an RF circuit and a video signal circuit by a high frequency component using a simple structure by a method wherein a capacitor array is formed on both sides of an insulated substrate, an input-output terminal and a grounding terminal are provided alternately, the circumference of the input-output terminal is covered with a gland and connected to a shielding case. CONSTITUTION:The protrusion 5 on the lower end of a shield case 4 is inserted into the groove 2 in the center part of a capacitor array 1 mounted on a printed circuit substrate 3, or they are connected by soldering. A capacitor array 1 formed on both sides of the insulated substrate 3, an input-output terminal and a ground terminal are alternately provided, the circumference of the input- output terminal is covered with a gland, it is connected to the shield case, and as a result, the same function as a lead-through capacitor can be easily given to the above-mentioned device by a simple structure in such a manner that no disturbance will be given by high frequency component on an RF circuit and a video signal circuit, shielding can be conducted on each functional block, and the development on a digital circuit can also be facilitated Also, a chassis multifunctionable on the same circuit substrate can be formed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a capacitor device used as a countermeasure against interference in electronic equipment circuits.

Background of the Invention In recent years, digitalization of electronic equipment has become mainstream, and many cyclic frequencies are being used.The harmonic components of these intrude into RF circuits and video signal circuits and cause interference, and also affect other electronic equipment, resulting in EMI. As a countermeasure, it is combined with filters and feedthrough capacitors.

A conventional capacitor device will be explained below.

As shown in FIG. 7, printed circuit boards 15, 16 are provided on both sides of the metal fitting 14 to which the feedthrough capacitor 13 is attached, and connectors 17, 18, lead wires, etc. are provided for connection to other circuits. 19°2o is a printed circuit board,
21 is a shield case.

Problems to be Solved by the Invention However, the conventional configuration described above requires metal fittings for mounting the feedthrough capacitor and printed circuit boards on both sides to connect the input and output of the capacitor, resulting in a complex structure and increased cost. There was a problem.

The present invention solves the above-mentioned conventional problems, and aims to provide a capacitor device with a simple structure that does not require a feedthrough capacitor, a printed circuit board, etc.

Means for Solving the Problem In order to solve this problem, the capacitor device of the present invention has the following features:
It has a configuration in which a capacitor play is formed on the image side of an insulating substrate, input/output terminals and ground terminals are provided alternately, the periphery of the input/output terminal is covered with ground, and it is connected to a shield case.

Function: With this configuration, a capacitor array is mounted on the input/output terminals of the printed circuit board to bypass interference components to ground, and the capacitor array and shield case are connected to have the same function as a feed-through capacitor. It will be done.

EXAMPLE An example of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, the protrusion 5 at the lower end of the shield case 4 is fitted into the groove 2 at the center of the capacitor array 1 mounted on the printed circuit board 3 or connected by soldering. Reference numeral 6 indicates mounted components other than the capacitor array 1.

As shown in FIGS. 3 and 4, lower electrodes 8. A dielectric 9 and an upper electrode 10 are formed to constitute a capacitor. 11 is an input/output terminal, and 12 is an external case.

A capacitor array 1 is formed by forming a capacitor having a predetermined capacitance on an insulating substrate 7 with a circuit configuration shown in FIG. q
-q indicates a ground terminal, and tl to tn1 n indicate input/output terminals.

As shown in FIG. 6, ground foil is used except around the input/output terminals t1 to 70, and the bottom part can also be soldered, so that the area around the input/output lines is covered with ground.

As described above, according to this embodiment, capacitor arrays are formed on both sides of an insulating substrate, input/output terminals and ground terminals are provided alternately, the periphery of the input/output terminals is covered with ground, and the area is connected to the shield case. In addition, it has a simple structure that can easily perform the same function as a feed-through capacitor to prevent high-frequency components from interfering with RF circuits and video signal circuits, and it is possible to shield each functional block, making it suitable for digital circuits. It will also be easier to expand. Furthermore, it is possible to form a chassis with multiple #I functions on the same circuit board.

Effects of the Invention As is clear from the description of the embodiments above, the present invention forms capacitor arrays on both sides of an insulating substrate, provides input/output terminals and ground terminals alternately, and connects the periphery of the input/output terminals to the ground. By covering the capacitor and connecting it to the shield case, it is possible to realize an excellent capacitor device that has a simple structure and can prevent high frequency components from interfering with the RF circuit or the video signal circuit.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view showing the configuration of a capacitor device according to an embodiment of the present invention, Fig. 2 is a side sectional view of the same, Fig. 3 is a sectional view of the capacitor array, and Fig. 4 is the configuration of the capacitor play. FIG. 6 is a circuit diagram of the iM capacitor array, FIG. 6 is a perspective view of the same capacitor array, and FIG. 7 is a conceptual diagram showing the configuration of a conventional capacitor device. 1...Capacitor array, 2...Groove,
3...Printed circuit board, 4...Shield case. Name of agent: Patent attorney Shigetaka Awano and one other person

Claims (2)

[Claims] (1) A capacitor device in which a capacitor array is formed on both sides of an insulating substrate, input/output terminals and ground terminals are provided alternately, the periphery of the input/output terminal is covered with ground, and the capacitor device is connected to a shield case. (2) Claim 1 in which a groove is provided in the center of the capacitor array.
Capacitor device as described.