JPH0369974U - - Google Patents
Info
- Publication number
- JPH0369974U JPH0369974U JP12937189U JP12937189U JPH0369974U JP H0369974 U JPH0369974 U JP H0369974U JP 12937189 U JP12937189 U JP 12937189U JP 12937189 U JP12937189 U JP 12937189U JP H0369974 U JPH0369974 U JP H0369974U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- frequency
- output
- outputs
- detection circuit
- 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 6
- 230000000737 periodic effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Description
第１図は本考案に係るビデオカメラの電源同期
装置の実施例を示すブロツク図、第２図は該実施
例における各信号を示すタイムチヤート図、第３
図は他の周波数検出回路の実施例における出力波
形を示す図である。
１２……周波数検出回路、１４……ゼロクロス
検出器、１６……切換スイツチ、１８……分周回
路、２０……リングカウンター回路、２２……リ
ングカウンター、２４……選択回路、２６……マ
ルチプレクサ、２８……選択スイツチ、３０……
位相同期ループ回路、３２……位相検出器、３４
……ループフイルター、３６……電圧制御発振器
、３８……同期信号発生器、４０……分周器。
FIG. 1 is a block diagram showing an embodiment of the power synchronization device for a video camera according to the present invention, FIG. 2 is a time chart showing each signal in the embodiment, and FIG.
The figure is a diagram showing an output waveform in another embodiment of the frequency detection circuit. 12... Frequency detection circuit, 14... Zero cross detector, 16... Changeover switch, 18... Frequency divider circuit, 20... Ring counter circuit, 22... Ring counter, 24... Selection circuit, 26... Multiplexer , 28...Selection switch, 30...
Phase-locked loop circuit, 32... Phase detector, 34
... Loop filter, 36 ... Voltage controlled oscillator, 38 ... Synchronization signal generator, 40 ... Frequency divider.
Claims (1)
しい周波数のパルス信号を出力する周波数検出回
路と、 該周波数検出回路の出力を分周回路又はリング
カウンター回路へ送る切換スイツチと、 周波数検出回路の出力を６分の１に分周する分
周回路と、 周波数検出回路の出力を５分の１に分周するリ
ングカウンター回路と、 選択スイツチの操作により前記リングカウンタ
ー回路の出力の内の何れか一つを選択して出力す
る選択回路と、 同期信号発生器からの垂直同期信号を６分の１
に分周して位相検出器に入力し、この入力と前記
分周回路又は前記選択回路の出力と比較し、位相
検出器の出力をループフイルターを介して電圧制
御発振器に入力し、該電圧制御発振器の周力に基
いて周期信号発生器から垂直同期信号及び水平同
期信号を出力させる位相同期ループ回路と、 を有することを特徴とするビデオカメラの電源同
期装置。[Claims for Utility Model Registration] A frequency detection circuit that outputs a pulse signal with a frequency equal to the power frequency in synchronization with the power frequency of an AC power source, and a switch that sends the output of the frequency detection circuit to a frequency divider circuit or a ring counter circuit. a frequency divider circuit that divides the output of the frequency detection circuit into 1/6, a ring counter circuit that divides the output of the frequency detection circuit into 1/5, and the ring counter circuit by operating the selection switch. a selection circuit that selects and outputs one of the outputs of the
This input is compared with the output of the frequency dividing circuit or the selection circuit, and the output of the phase detector is inputted to the voltage controlled oscillator via a loop filter, and the voltage control is performed. A power synchronization device for a video camera, comprising: a phase-locked loop circuit that outputs a vertical synchronization signal and a horizontal synchronization signal from a periodic signal generator based on the circumferential force of an oscillator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12937189U JPH0369974U (en) | 1989-11-06 | 1989-11-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12937189U JPH0369974U (en) | 1989-11-06 | 1989-11-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0369974U true JPH0369974U (en) | 1991-07-12 |
Family
ID=31677003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12937189U Pending JPH0369974U (en) | 1989-11-06 | 1989-11-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0369974U (en) |
-
1989
- 1989-11-06 JP JP12937189U patent/JPH0369974U/ja active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS55147077A (en) | Synchronizing signal generator | |
| JPH0369974U (en) | ||
| CA2061772A1 (en) | Synchronous detector | |
| JP2514977B2 (en) | VCO device for secum encoder | |
| JPH0270583U (en) | ||
| JPS5696581A (en) | Generating circuit for vertical blanking signal and virtual vertical synchronizing signal | |
| JPH01103975U (en) | ||
| SU985946A1 (en) | Phase-ock loop | |
| JPS61195644U (en) | ||
| JPH02113442U (en) | ||
| JPS62186533U (en) | ||
| JPH0478829U (en) | ||
| JPH0412763U (en) | ||
| JPH0478572U (en) | ||
| JPH0475469U (en) | ||
| JPH0210637U (en) | ||
| JPH0390283U (en) | ||
| JPH01110576U (en) | ||
| JPH01108628U (en) | ||
| JPS6316726U (en) | ||
| JPS61171320U (en) | ||
| JPH02138794U (en) | ||
| JPS62177129U (en) | ||
| JPH03120132U (en) | ||
| JPS63191779U (en) |