JPS63200360U

JPS63200360U -

Info

Publication number: JPS63200360U
Application number: JP9148287U
Authority: JP
Priority date: 1987-06-15
Filing date: 1987-06-15
Publication date: 1988-12-23

Description

[Brief explanation of drawings]

第１図は本考案の一実施例のパターン図、第２
図は同上の他の実施例のパターン図、第３図は電
源回路の回路図、第４図は第３図に対応した従来
例のパターン図、第５図は電源回路の回路図、第
６図は第５図に対応した従来例のパターン図であ
る。４はプリント板、５，６は銅箔パターン、７，
８は接合部である。 Figure 1 is a pattern diagram of an embodiment of the present invention, Figure 2 is a pattern diagram of an embodiment of the present invention.
The figure is a pattern diagram of another embodiment same as above, Figure 3 is a circuit diagram of a power supply circuit, Figure 4 is a pattern diagram of a conventional example corresponding to Figure 3, Figure 5 is a circuit diagram of a power supply circuit, and Figure 6 is a diagram of a conventional example. This figure is a pattern diagram of a conventional example corresponding to FIG. 5. 4 is a printed board, 5 and 6 are copper foil patterns, 7,
8 is a joint.

Claims

[Scope of Claim for Utility Model Registration] (1) To increase the effect of electrostatic shielding due to electrostatic induction between a metal case housing a printed board on which electronic components constituting an electronic circuit are mounted, or to increase the current capacity. In view of this, in a printed wiring board in which the width of the copper foil pattern is widened in order to reduce heat generation in the copper foil pattern, the width of the copper foil pattern is narrowed only at the joint portion of the printed board where the electronic components are connected. A printed wiring board characterized by: (2) The above electronic circuit is made into a choppy type power supply circuit,
2. The printed wiring board according to claim 1, wherein the electronic component to which the copper foil pattern is narrowed and connected is a noise prevention capacitor of the power supply circuit.