JPS5877374A - Horizontal afc device for television receiver - Google Patents
Horizontal afc device for television receiverInfo
- Publication number
- JPS5877374A JPS5877374A JP17608381A JP17608381A JPS5877374A JP S5877374 A JPS5877374 A JP S5877374A JP 17608381 A JP17608381 A JP 17608381A JP 17608381 A JP17608381 A JP 17608381A JP S5877374 A JPS5877374 A JP S5877374A
- Authority
- JP
- Japan
- Prior art keywords
- horizontal
- circuit
- transistor
- television receiver
- emitter
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/04—Synchronising
- H04N5/12—Devices in which the synchronising signals are only operative if a phase difference occurs between synchronising and synchronised scanning devices, e.g. flywheel synchronising
- H04N5/126—Devices in which the synchronising signals are only operative if a phase difference occurs between synchronising and synchronised scanning devices, e.g. flywheel synchronising whereby the synchronisation signal indirectly commands a frequency generator
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Synchronizing For Television (AREA)
Abstract
Description
【発明の詳細な説明】
本発明はテレビジョン受像機の水平ムＦＣ装置に関する
ものであり、同期分離回路の出力である水平同期信号中
の雑音による悪影響を除去しようとするものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a horizontal FC device for a television receiver, and is intended to eliminate the adverse effects of noise in a horizontal synchronization signal output from a synchronization separation circuit.
第１図に示すように入力端子１に加えられた映像信号は
同期分離回路２で同期分離され、その出−−Ｚ
力である水平同期信号はノイズ除去回路３を介して水平
ムｙｃ検波回路４に加えられる。この水平ムＦＣ検波回
路４には水平のこぎり波電圧発生回路６よりののこぎり
波６が加えられている。水平ムｙｃ検波回路４の検波出
力は低域フィルタ６を介して水平発振回路７に加えられ
ている。８は垂直発振回路、９は垂直トリガ回路である
。As shown in FIG. 1, the video signal applied to the input terminal 1 is synchronously separated by the synchronous separator 2, and its output, the horizontal synchronous signal, is sent to the horizontal muyc detection circuit via the noise removal circuit 3. Added to 4. A sawtooth wave 6 from a horizontal sawtooth voltage generation circuit 6 is applied to the horizontal FC detection circuit 4 . The detected output of the horizontal mu-yc detection circuit 4 is applied to a horizontal oscillation circuit 7 via a low-pass filter 6. 8 is a vertical oscillation circuit, and 9 is a vertical trigger circuit.
従来のノイズ除去回路３の一例は、同期分離回路２から
の水平同期信号をたとえば同期信号の頭部でスライスし
て同期信号より上に出たノイズを除去するものである。An example of the conventional noise removal circuit 3 is to slice the horizontal synchronization signal from the synchronization separation circuit 2, for example, at the head of the synchronization signal to remove noise appearing above the synchronization signal.
このノイズ除去回路では走査期間に存在するノイズ成分
は同期信号の頭部より下のものは残ることになり、この
ノイズが水平ムｙｃ検波回路４を出て水平発振回路７に
悪影響を与えることになる。In this noise removal circuit, noise components existing during the scanning period below the head of the synchronizing signal remain, and this noise exits the horizontal muyc detection circuit 4 and adversely affects the horizontal oscillation circuit 7. Become.
そこで、本発明は上記のような悪影響を除去しようとす
るものであり、以下本発明の一実施例について図面とと
もに説明する。Therefore, the present invention aims to eliminate the above-mentioned adverse effects, and one embodiment of the present invention will be described below with reference to the drawings.
ブロック図は第１図と同じであるが、ノイズ除去回路は
第２図に示す通りである０すなわち、同期分離２の出力
である第３図亀に示す水平同期信号ヲトランジスタ１ｏ
のベースに加え、同トランジスタ１０のコレクタに端子
１１より第３図すに示すフライバックパルスを加え、こ
のパルス期間だけトラン、ジスタ１ｏが導通状態となる
ようにする。トランジスタ１０のエミッタは抵抗１２を
介して接地され、また、エミッタより第３図Ｃの出力が
取出され水平ムｙｃ検波回路４に加えられる。The block diagram is the same as in Fig. 1, but the noise removal circuit is as shown in Fig. 2. In other words, the horizontal synchronization signal shown in Fig. 3, which is the output of synchronous separation 2, is transferred to the transistor 1o.
In addition to the base of the transistor 10, a flyback pulse as shown in FIG. The emitter of the transistor 10 is grounded through a resistor 12, and the output shown in FIG.
このように、フライバックパルスの期間だけ水平同期信
号を取出すようにしたので走査期間におけるノイズは除
去され、水平発振に悪影響を与えることがなくなるもの
である。In this way, since the horizontal synchronizing signal is extracted only during the flyback pulse period, noise during the scanning period is removed and does not adversely affect horizontal oscillation.
以上のように本発明によれば同期分離回路の出力より水
平同期信号のみを抜き出すようにしたのでノイズによる
悪影響を少くすることができるものである。As described above, according to the present invention, only the horizontal synchronization signal is extracted from the output of the synchronization separation circuit, so that the adverse effects of noise can be reduced.
第１図は従来例におけるテレビジョン受像機の水平ムｙ
ｃ装置のブロック線図、第２図は本発明の一実施例にお
けるテレビジョン受像機の水平ムｙｃ装置の要部の回路
図、第３図ａ、ｂ、ａは同装置説明のだめの波形図であ
る。
２・・・・・・同期分離回路、６・・・・・・水平のこ
ぎシ波電圧発生回路、１０・・・・・・トランジスタ、
１２・・・・・・抵抗、１１・・・・・・端子、４・・
・・・・水平ムｙｃ検波回路。
代理人の氏名 弁理士 中 尾 敏 男 ほか１基部
１ 図
、Ｑ
第２図
第３図Figure 1 shows the horizontal angle of a conventional television receiver.
Fig. 2 is a circuit diagram of the main part of the horizontal muyc device of a television receiver according to an embodiment of the present invention, and Fig. 3 a, b, and a are waveform diagrams for explaining the same device. It is. 2... Synchronous separation circuit, 6... Horizontal sawtooth voltage generation circuit, 10... Transistor,
12...Resistance, 11...Terminal, 4...
...Horizontal mu yc detection circuit. Name of agent: Patent attorney Toshio Nakao and 1 other group
1 Figure, Q Figure 2 Figure 3
Claims (1)
ベースに加え、このトランジスタのコレクタにフライバ
ックパルスを加え、このフライバックパルス期間のみこ
のトランジスタが導通するよう構成し、上記トランジス
タのエミッタを抵抗を介して接地するとともに、同エミ
ッタに得られる出力と水平のこぎシ波電圧発生回路のの
こぎり波を水平ムｙｃ検波回路に加えたテレビジョン受
像機の水平ムｙｃ装置。The horizontal synchronization signal obtained by the synchronization separation circuit is applied to the base of the transistor, a flyback pulse is applied to the collector of this transistor, the transistor is made conductive only during this flyback pulse period, and the emitter of the transistor is connected to a resistor. A horizontal muyc device for a television receiver, in which the output obtained from the emitter and the sawtooth wave of a horizontal sawtooth voltage generation circuit are added to a horizontal muyc detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17608381A JPS5877374A (en) | 1981-11-02 | 1981-11-02 | Horizontal afc device for television receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17608381A JPS5877374A (en) | 1981-11-02 | 1981-11-02 | Horizontal afc device for television receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5877374A true JPS5877374A (en) | 1983-05-10 |
Family
ID=16007417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17608381A Pending JPS5877374A (en) | 1981-11-02 | 1981-11-02 | Horizontal afc device for television receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5877374A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5760839A (en) * | 1993-05-19 | 1998-06-02 | Kabushiki Kaisha Toshiba | Horizontal synchronizing apparatus |
-
1981
- 1981-11-02 JP JP17608381A patent/JPS5877374A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5760839A (en) * | 1993-05-19 | 1998-06-02 | Kabushiki Kaisha Toshiba | Horizontal synchronizing apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH07101921B2 (en) | Synchronous circuit with noise adjusted slice levels | |
| JPS6014553B2 (en) | Television synchronization signal separation circuit | |
| JPS5877374A (en) | Horizontal afc device for television receiver | |
| CA1112755A (en) | Burst gate circuit | |
| JPH0654374U (en) | Correction circuit for time difference between luminance signal and color signal | |
| JP2515636B2 (en) | Video signal processor | |
| JP2612515B2 (en) | Synchronous signal separation device | |
| US4912691A (en) | Video stabilizer | |
| US3531593A (en) | Apparatus for providing field-recognition signals for interlace-display video | |
| JPH0457276B2 (en) | ||
| JPH0510463Y2 (en) | ||
| JPS58178669A (en) | Synchronization separating device | |
| JPH0528847Y2 (en) | ||
| KR940005288Y1 (en) | Synchronous signal selection ic | |
| JPH031694A (en) | Color signal eliminating circuit | |
| JP3140202B2 (en) | Ghost removal device | |
| JPS58177079A (en) | Synchronizing separation circuit | |
| JPH0153545B2 (en) | ||
| JPS5936059Y2 (en) | Synchronous signal separation circuit | |
| JPS63318870A (en) | Separating circuit for synchronizing pulse of picture signal | |
| JPH0413375A (en) | Synchronizing separator circuit | |
| KR910006093Y1 (en) | Picture in picture signal processing circuit | |
| JPS62299Y2 (en) | ||
| JPH03151769A (en) | Clamp pulse generating circuit | |
| JPH0159787B2 (en) |