JPH01156664U - - Google Patents
Info
- Publication number
- JPH01156664U JPH01156664U JP5334588U JP5334588U JPH01156664U JP H01156664 U JPH01156664 U JP H01156664U JP 5334588 U JP5334588 U JP 5334588U JP 5334588 U JP5334588 U JP 5334588U JP H01156664 U JPH01156664 U JP H01156664U
- Authority
- JP
- Japan
- Prior art keywords
- high voltage
- horizontal
- circuit
- output signal
- drive output
- 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
- 230000005856 abnormality Effects 0.000 claims description 4
- 230000010355 oscillation Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
Landscapes
- Details Of Television Scanning (AREA)
Description
第１図は本考案の高圧保護回路の実施例を示す
図、第２図は第１図の動作を説明するための波形
図、第３図は従来の高圧保護回路を示す図、第４
図は第３図の動作を説明するための波形図である
。
１…水平発振回路、２…水平偏向出力回路、３
…高圧発生回路、４…高圧異常信号発生回路、６
…水平ドライブ出力信号停止回路、７…ＮＯＲ回
路、８…サイリスタ動作をする回路、９…ＡＮＤ
回路、Ｃ０…Ｓ字補正用コンデンサ、Ｃ１…共振
用コンデンサ、Ｃ２…コンデンサ、ＣＲＴ…ブラ
ウン管、Ｄ１…ダンパーダイオード、Ｄ２…高圧
整流ダイオード、Ｄ３…ダイオード、Ｄ４…ツエ
ナーダイオード、ＤＴ…水平ドライブトランス、
ＦＢＴ…フライバツクトランス、Ｌ…水平偏向コ
イル、Ｑ１…水平ドライブトランジスタ、Ｑ２…
水平出力トランジスタ、Ｑ３，Ｑ５…ＮＰＮトラ
ンジスタ、Ｑ４，Ｑ６…ＰＮＰトランジスタ、Ｒ
１〜Ｒ９…抵抗、Ｔ１，Ｔ２…タイミング、ＶＡ
，ＶＢ…直流電圧源、ｅ１〜ｅ８…信号、ｉ…コ
レクタ電流。
FIG. 1 is a diagram showing an embodiment of the high voltage protection circuit of the present invention, FIG. 2 is a waveform diagram for explaining the operation of FIG. 1, FIG. 3 is a diagram showing a conventional high voltage protection circuit, and FIG.
The figure is a waveform diagram for explaining the operation of FIG. 3. 1...Horizontal oscillation circuit, 2...Horizontal deflection output circuit, 3
...High voltage generation circuit, 4...High voltage abnormality signal generation circuit, 6
...Horizontal drive output signal stop circuit, 7...NOR circuit, 8...Thyristor operation circuit, 9...AND
Circuit, C 0 ... S-shaped correction capacitor, C 1 ... Resonance capacitor, C 2 ... Capacitor, CRT... Braun tube, D 1 ... Damper diode, D 2 ... High voltage rectifier diode, D 3 ... Diode, D 4 ... Zener diode. , DT...horizontal drive transformer,
FBT...flyback transformer, L...horizontal deflection coil, Q1 ...horizontal drive transistor, Q2 ...
Horizontal output transistor, Q 3 , Q 5 ... NPN transistor, Q 4 , Q 6 ... PNP transistor, R
1 to R9 ...Resistance, T1 , T2 ...Timing, VA
, VB...DC voltage source, e1 to e8 ...signal, i...collector current.
Claims (1)
出力する水平発振回路と、 前記水平ドライブ出力信号によりスイツチング
動作を行う水平出力トランジスタを有する水平偏
向出力回路と、 前記水平偏向出力回路で発生するフライバツク
パルスを昇圧、整流して高圧を発生する高圧発生
回路と、 前記高圧発生回路の高圧値が所定値を超えたこ
とを検出し、高圧異常信号を発生する高圧異常信
号発生回路と、 前記高圧異常信号により、前記水平出力トラン
ジスタのコレクタ電流のカツトオフ期間において
、前記水平ドライブ出力信号の供給を停止させる
水平ドライブ出力信号停止回路とより構成したこ
とを特徴とする高圧保護回路。[Claims for Utility Model Registration] A horizontal oscillation circuit that oscillates at a horizontal frequency and outputs a horizontal drive output signal; A horizontal deflection output circuit having a horizontal output transistor that performs a switching operation based on the horizontal drive output signal; and the horizontal deflection circuit. A high voltage generation circuit that boosts and rectifies flyback pulses generated in the output circuit to generate high voltage; and a high voltage abnormality signal that detects that the high voltage value of the high voltage generation circuit exceeds a predetermined value and generates a high voltage abnormality signal. A high voltage protection circuit comprising: a generation circuit; and a horizontal drive output signal stop circuit that stops supplying the horizontal drive output signal during a cutoff period of the collector current of the horizontal output transistor in response to the high voltage abnormality signal. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5334588U JPH01156664U (en) | 1988-04-20 | 1988-04-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5334588U JPH01156664U (en) | 1988-04-20 | 1988-04-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01156664U true JPH01156664U (en) | 1989-10-27 |
Family
ID=31279328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5334588U Pending JPH01156664U (en) | 1988-04-20 | 1988-04-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01156664U (en) |
-
1988
- 1988-04-20 JP JP5334588U patent/JPH01156664U/ja active Pending
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