JPS628674A - Power supply unit - Google Patents
Power supply unitInfo
- Publication number
- JPS628674A JPS628674A JP60148714A JP14871485A JPS628674A JP S628674 A JPS628674 A JP S628674A JP 60148714 A JP60148714 A JP 60148714A JP 14871485 A JP14871485 A JP 14871485A JP S628674 A JPS628674 A JP S628674A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- power supply
- power source
- foil
- video
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、テレビ受像機のスイッチング電源回路を用い
た電源装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a power supply device using a switching power supply circuit for a television receiver.
従来の技術
近年、ニューメディア時代を迎え、テレビ受像機に接続
される周辺機器が増加してきている。このため、テレビ
受像機の電源回路として、広い安定領域を持ち、かつ低
コストのものが望まれている。従来は音声出力回路へは
別電源回路より電源を供給しているものが主流であった
が、近年では音声出力回路へも同一電源回路で供給でき
るスイッチング電源が主流となりつつある。BACKGROUND OF THE INVENTION In recent years, with the arrival of the new media era, the number of peripheral devices connected to television receivers has increased. Therefore, a power supply circuit for a television receiver that has a wide stability range and is low in cost is desired. Conventionally, it has been mainstream to supply power to the audio output circuit from a separate power supply circuit, but in recent years switching power supplies that can also supply power to the audio output circuit from the same power supply circuit have become mainstream.
発明が解決しようとする問題点
し７かしながら、音声出力回路とビデオ・クロマ回路等
に同一のスイッチング電源で各電圧を供給しようとする
と、音声出力全最大にした時に画面上に、音声と同期し
た横線が入る（以後、音稿と略す）という問題点が発生
しやすくなる。Problems to be Solved by the Invention 7 However, if you try to supply each voltage to the audio output circuit and the video/chroma circuit, etc. with the same switching power supply, when the audio output is set to maximum, the audio and video signals will appear on the screen. The problem of synchronized horizontal lines (hereinafter referred to as "auto draft") is likely to occur.
本発明はこの音声出力回路の影響をビデオ・クロマ回路
に与えることのない電源回路を提供することを目的とす
る。An object of the present invention is to provide a power supply circuit that does not have the effect of this audio output circuit on the video chroma circuit.
問題点を解決するための手段
上記問題点を解決するために、本発明の電源装置は、ス
イッチング電源回路を構成したプリント基板において、
音声出力回路へ供給する電源用のアース箔と他の回路用
のアース箔とを分離し、その間に電解コンデンサーを挿
入するという構成を採用したものである。Means for Solving the Problems In order to solve the above problems, the power supply device of the present invention includes a printed circuit board that constitutes a switching power supply circuit.
This configuration employs a configuration in which the grounding foil for the power supply to the audio output circuit is separated from the grounding foil for other circuits, and an electrolytic capacitor is inserted between them.
作用
このような構成によりて、音声出力回路の音声による電
源変動があっても電解コンデンサによりバイパスするこ
とができ、ビデオ・クロマ回路に与えられる影響を軽減
することができ、音稿を軽減することができる。Effect: With this configuration, even if there is a power fluctuation caused by the sound in the audio output circuit, it can be bypassed by the electrolytic capacitor, and the influence on the video chroma circuit can be reduced, thereby reducing the sound quality. Can be done.
実施例
以下、本発明の一実施例について、図面を参照しながら
説明する。図は、本発明の一実施例におけ、るテレビ受
像機の電源回路のブロック図を示すものである。図にお
いて、１はスイッチング電源回路を構成したプリント板
、２はその他の回路を構成したプリント板、３は両者の
間を結合するリード線、４はプリント基板１中で音声出
力回路２ａ用の電源回路のアース箔５ａと他のビデオ・
クロマ回路２ｂ等の電源回路のアース箔５ｂとの間に接
続し５た本発明のバイパス用の電解コンデンサ、６はス
イッチングトランスである。EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings. The figure shows a block diagram of a power supply circuit of a television receiver according to an embodiment of the present invention. In the figure, 1 is a printed board that constitutes a switching power supply circuit, 2 is a printed board that constitutes other circuits, 3 is a lead wire that connects the two, and 4 is a power supply for the audio output circuit 2a in the printed circuit board 1. Circuit ground foil 5a and other video
A bypass electrolytic capacitor 5 of the present invention is connected between the earth foil 5b of the power supply circuit such as the chroma circuit 2b, and 6 is a switching transformer.
以上のように構成された回路について、以下その動作に
ついて説明する。The operation of the circuit configured as described above will be explained below.
音声出力回路２＆において発生した電源変動分は、図の
矢印の径路を通−て吸収される。特に、ビデオ・クロマ
回路２ｂへけ、バイパス用のコンデンサ４により吸収さ
れるために影響が少なくなる。これにより、音稿も軽減
され、目視では全くわからないようにすることができる
。The power fluctuations generated in the audio output circuit 2& are absorbed through the path indicated by the arrow in the figure. In particular, the influence on the video chroma circuit 2b is reduced because it is absorbed by the bypass capacitor 4. This reduces the number of audio drafts, making them completely invisible to the naked eye.
発明の効果
以上のように、本発明によれば、アース箔を分離し５、
その間にバイパス用のコンデンサを挿入することによっ
て、音稿を軽減することができ、その実用的効果は犬な
るものがある。Effects of the Invention As described above, according to the present invention, the earth foil is separated and
By inserting a bypass capacitor in between, it is possible to reduce noise, and this has a significant practical effect.
図は本発明の一実施例における電源装置のブロック図で
ある。
１・・・・・・スイッチング電源プリント板、２２Ｌ・
川・・音声出力回路、２ｂ・・・・・・ビデオ・クロマ
回路、６ａ、、５ｂ・・・・・・アース箔、４・・・・
・・バイパス用のコンデンサ。The figure is a block diagram of a power supply device in an embodiment of the present invention. 1...Switching power supply printed board, 22L.
River...Audio output circuit, 2b...Video chroma circuit, 6a, 5b...Ground foil, 4...
...Bypass capacitor.
Claims (1)
電圧を供給するスイッチング電源回路を構成したプリン
ト基板内で音声出力回路へ供給する電源用のアース箔と
他の回路用のアース箔とを分離し、両アース箔間にバイ
パス用のコンデンサーを挿入したことを特徴とする電源
装置。Within the printed circuit board that constitutes the switching power supply circuit that supplies power supply voltage to the audio output circuit and the video/chroma circuit, separate the grounding foil for the power supply to the audio output circuit and the grounding foil for other circuits. A power supply device characterized by a bypass capacitor inserted between ground foils.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60148714A JPS628674A (en) | 1985-07-05 | 1985-07-05 | Power supply unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60148714A JPS628674A (en) | 1985-07-05 | 1985-07-05 | Power supply unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS628674A true JPS628674A (en) | 1987-01-16 |
Family
ID=15458952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60148714A Pending JPS628674A (en) | 1985-07-05 | 1985-07-05 | Power supply unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS628674A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5331354A (en) * | 1990-09-26 | 1994-07-19 | Matsushita Electric Industrial Co., Ltd. | Power supply apparatus for television receiver set and television receiver set including the same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5011719A (en) * | 1973-06-04 | 1975-02-06 |
-
1985
- 1985-07-05 JP JP60148714A patent/JPS628674A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5011719A (en) * | 1973-06-04 | 1975-02-06 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5331354A (en) * | 1990-09-26 | 1994-07-19 | Matsushita Electric Industrial Co., Ltd. | Power supply apparatus for television receiver set and television receiver set including the same |
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