JPS61136675U - - Google Patents
Info
- Publication number
- JPS61136675U JPS61136675U JP1850685U JP1850685U JPS61136675U JP S61136675 U JPS61136675 U JP S61136675U JP 1850685 U JP1850685 U JP 1850685U JP 1850685 U JP1850685 U JP 1850685U JP S61136675 U JPS61136675 U JP S61136675U
- Authority
- JP
- Japan
- Prior art keywords
- beam current
- voltage
- output
- switching transistor
- base
- 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.)
- Granted
Links
- 238000004804 winding Methods 0.000 claims description 4
- 230000010355 oscillation Effects 0.000 claims description 2
- 230000007423 decrease Effects 0.000 claims 2
- 238000001514 detection method Methods 0.000 claims 1
- 230000001747 exhibiting effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Details Of Television Scanning (AREA)
Description
第１図乃至第４図はいずれも本考案に係り第１
図は一実施回路例、第２図はフライバツクトラン
スのビーム電流対３次巻線出力及び高圧出力の関
係を表わす図、第３図はビーム電流対Ｂ点の電圧
及び高圧出力の関係を表わす図、第４図はホール
ドダウン曲線を示す図である。第５図は従来例を
示す回路図である。
３０……フライバツクトランス、３６……スイ
ツチングトランジスタ、３５……第１定電圧素子
、３９……第２定電圧素子、４３……高インピー
ダンス回路、４７……水平発振回路。
Figures 1 to 4 all relate to the present invention.
The figure shows an example of an implemented circuit, Figure 2 shows the relationship between the beam current of the flyback transformer versus the tertiary winding output and high voltage output, and Figure 3 shows the relationship between the beam current versus the voltage at point B and the high voltage output. FIG. 4 is a diagram showing a holddown curve. FIG. 5 is a circuit diagram showing a conventional example. 30... flyback transformer, 36... switching transistor, 35... first constant voltage element, 39... second constant voltage element, 43... high impedance circuit, 47... horizontal oscillation circuit.
Claims (1)
圧がビーム電流の減少と共に低下する特性を有す
るフライバツクトランスによつてアノード電圧を
供給すべく構成したテレビジヨン受像機において
、前記３次巻線の出力に比例した直流電圧を第１
定電圧素子を介してエミツタに接続したスイツチ
ングトランジスタのベースに、前記所定のビーム
電流に対応する３次巻線出力に比例した直流電圧
で動作する第２電圧素子を接続し、異常高圧或は
ビーム電流発生時に上記スイツチングトランジス
タの出力で水平発振回路の動作を停止すべく構成
したテレビジヨン受像機のホールドダウン回路。 (2) 上記フライバツクトランスのビーム電流供
給路に接続されたビーム電流検出用抵抗の電圧降
下端子と前記スイツチングトランジスタのベース
との間に上記ベースからみて高インピーダンスを
呈する回路を接続したことを特徴とする実用新案
登録請求の範囲第１項記載のテレビジヨン受像機
のホールドダウン回路。[Claims for Utility Model Registration] (1) A television configured to supply an anode voltage by a flyback transformer having a characteristic that the output voltage of the tertiary winding decreases as the beam current decreases below a predetermined beam current. In the digital receiver, a DC voltage proportional to the output of the tertiary winding is applied to the first
A second voltage element that operates with a DC voltage proportional to the tertiary winding output corresponding to the predetermined beam current is connected to the base of the switching transistor connected to the emitter via the constant voltage element, and A hold-down circuit for a television receiver configured to stop the operation of a horizontal oscillation circuit using the output of the switching transistor when a beam current is generated. (2) A circuit exhibiting high impedance as viewed from the base is connected between the voltage drop terminal of the beam current detection resistor connected to the beam current supply path of the flyback transformer and the base of the switching transistor. A hold-down circuit for a television receiver as claimed in claim 1 of the patented utility model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1850685U JPH0411407Y2 (en) | 1985-02-13 | 1985-02-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1850685U JPH0411407Y2 (en) | 1985-02-13 | 1985-02-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61136675U true JPS61136675U (en) | 1986-08-25 |
| JPH0411407Y2 JPH0411407Y2 (en) | 1992-03-23 |
Family
ID=30507210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1850685U Expired JPH0411407Y2 (en) | 1985-02-13 | 1985-02-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0411407Y2 (en) |
-
1985
- 1985-02-13 JP JP1850685U patent/JPH0411407Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0411407Y2 (en) | 1992-03-23 |
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