JPH01110563U - - Google Patents
Info
- Publication number
- JPH01110563U JPH01110563U JP577888U JP577888U JPH01110563U JP H01110563 U JPH01110563 U JP H01110563U JP 577888 U JP577888 U JP 577888U JP 577888 U JP577888 U JP 577888U JP H01110563 U JPH01110563 U JP H01110563U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- transistor
- voltage
- output
- deflection
- 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
- 238000001514 detection method Methods 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 claims 3
- 230000010354 integration Effects 0.000 claims 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Details Of Television Scanning (AREA)
Description
第１図は本考案の保護回路の一実施例回路図で
ある。
１……保護回路、２……垂直偏向出力端子（検
出端子）、３……積分回路、４……電源供給端子
、５……電源端子、６……検出回路、Ｃ１，Ｃ２
……コンデンサ、Ｄ１〜Ｄ４……ダイオード、Ｑ
１，Ｑ２……ＮＰＮトランジスタ、Ｒ１〜Ｒ７…
…抵抗。
FIG. 1 is a circuit diagram of an embodiment of the protection circuit of the present invention. DESCRIPTION OF SYMBOLS 1... Protection circuit, 2... Vertical deflection output terminal (detection terminal), 3... Integrating circuit, 4... Power supply terminal, 5... Power supply terminal, 6... Detection circuit, C 1 , C 2
...Capacitor, D1 to D4 ...Diode, Q
1 , Q2 ...NPN transistor, R1 to R7 ...
…resistance.
Claims (1)
介してコレクタが接続される第１のトランジスタ
と、水平発振回路の電源端子にコレクタが接続さ
れる第２のトランジスタと、該第１のトランジス
タのコレクタと該第２のトランジスタのベースと
を順方向に接続するダイオードと、偏向回路から
の出力交流信号を下方にクランプするクランパダ
イオードと、該下方クランプされた交流信号を直
流電圧に変換する積分回路と、該積分回路の出力
電圧が所定の電圧以下になつたときに上記第１の
トランジスタを非導通状態にする検出回路とを備
えることにより、垂直偏向出力の交流成分の有無
を検出し、垂直偏向発振が出力停止した時、水平
偏向発振を停止させるよう構成したことを特徴と
する保護回路。 a first transistor whose collector is connected via a resistor to a power supply terminal to which a desired voltage is supplied; a second transistor whose collector is connected to a power supply terminal of the horizontal oscillation circuit; A diode that connects the collector and the base of the second transistor in the forward direction, a clamper diode that clamps the output AC signal from the deflection circuit downward, and an integration circuit that converts the downwardly clamped AC signal into a DC voltage. and a detection circuit that turns the first transistor into a non-conductive state when the output voltage of the integrating circuit becomes equal to or lower than a predetermined voltage. A protection circuit characterized in that it is configured to stop horizontal deflection oscillation when output of deflection oscillation stops.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP577888U JPH01110563U (en) | 1988-01-20 | 1988-01-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP577888U JPH01110563U (en) | 1988-01-20 | 1988-01-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01110563U true JPH01110563U (en) | 1989-07-26 |
Family
ID=31209444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP577888U Pending JPH01110563U (en) | 1988-01-20 | 1988-01-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01110563U (en) |
-
1988
- 1988-01-20 JP JP577888U patent/JPH01110563U/ja active Pending
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