JPS6162488U - - Google Patents
Info
- Publication number
- JPS6162488U JPS6162488U JP14585984U JP14585984U JPS6162488U JP S6162488 U JPS6162488 U JP S6162488U JP 14585984 U JP14585984 U JP 14585984U JP 14585984 U JP14585984 U JP 14585984U JP S6162488 U JPS6162488 U JP S6162488U
- Authority
- JP
- Japan
- Prior art keywords
- controlled oscillator
- voltage controlled
- synchronization signal
- color subcarrier
- horizontal synchronization
- 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
- 230000010355 oscillation Effects 0.000 claims description 3
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 2
- 101000959126 Xenopus laevis Peptidyl-alpha-hydroxyglycine alpha-amidating lyase B Proteins 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Synchronizing For Television (AREA)
- Color Television Systems (AREA)
- Processing Of Color Television Signals (AREA)
Description
第１図が本考案によるＰＡＬ−Ｂ方式の同期信
号発生回路のブロツク図、第２図は判断回路２３
の具体的なブロツク図である。
１，２：電圧制御発振器、４：低域ろ波器、１
１，１２：電子スイツチ、１４：水晶振動子、１
５：発振回路、１７：分周器、２１：位相比較器
、２３：判断回路、２７，２８：電圧比較器、３
２：単安定発振回路。
FIG. 1 is a block diagram of a PAL-B synchronization signal generation circuit according to the present invention, and FIG. 2 is a judgment circuit 23.
FIG. 1, 2: Voltage controlled oscillator, 4: Low pass filter, 1
1, 12: Electronic switch, 14: Crystal oscillator, 1
5: Oscillation circuit, 17: Frequency divider, 21: Phase comparator, 23: Judgment circuit, 27, 28: Voltage comparator, 3
2: Monostable oscillation circuit.
Claims (1)
た水平同期信号を位相比較し、この誤差電圧によ
つてｍ倍の水平同期信号を発生する電圧制御発振
器を制御し、水平同期信号と色副搬送波信号の同
期をとる同期信号発生回路において、同期引込み
時のみ、上記ｍ倍の水平同期信号を発生する電圧
制御発振器に、その発振子と直列に所定インダク
タンスのインダクタを挿入すると共に、該電圧制
御発振器の共振容量を低減する手段を設け、該電
圧制御発振器の発振中心周波数を一定にしたまま
、周波数可変範囲を広げることを特徴とした同期
信号発生回路。 The phases of the color subcarrier signal divided by k/l and the horizontal synchronization signal divided by m/n are compared, and this error voltage is used to control a voltage controlled oscillator that generates a horizontal synchronization signal multiplied by m. In the synchronization signal generation circuit that synchronizes the color subcarrier signal and the color subcarrier signal, an inductor with a predetermined inductance is inserted in series with the oscillator of the voltage controlled oscillator that generates the horizontal synchronization signal multiplied by m only during synchronization pull-in, and A synchronizing signal generating circuit characterized in that a means for reducing the resonance capacitance of the voltage controlled oscillator is provided to widen the frequency variable range while keeping the oscillation center frequency of the voltage controlled oscillator constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14585984U JPS6162488U (en) | 1984-09-28 | 1984-09-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14585984U JPS6162488U (en) | 1984-09-28 | 1984-09-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6162488U true JPS6162488U (en) | 1986-04-26 |
Family
ID=30704110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14585984U Pending JPS6162488U (en) | 1984-09-28 | 1984-09-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6162488U (en) |
-
1984
- 1984-09-28 JP JP14585984U patent/JPS6162488U/ja active Pending
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