JPS6258970U - - Google Patents
Info
- Publication number
- JPS6258970U JPS6258970U JP15010585U JP15010585U JPS6258970U JP S6258970 U JPS6258970 U JP S6258970U JP 15010585 U JP15010585 U JP 15010585U JP 15010585 U JP15010585 U JP 15010585U JP S6258970 U JPS6258970 U JP S6258970U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- signal
- frequency
- sync separation
- camera
- 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.)
- Granted
Links
- 230000010355 oscillation Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 4
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 1
Description
図は本考案の一実施例を示す回路ブロツク図を
顕わす。
２…ＤＣ―ＤＣコンバータ、４…第２電圧制御
型発振回路、５…周期検出回路、７…同期分離回
路、９…第１電圧制御型発振回路、１０…同期信
号発生回路、１１…カメラ回路、Ａ…アダプタ、
Ｂ…ビデオカメラ、Ｃ…同軸ケーブル。
The figure reveals a circuit block diagram showing one embodiment of the present invention. 2...DC-DC converter, 4...Second voltage controlled oscillation circuit, 5...Period detection circuit, 7...Synchronization separation circuit, 9...First voltage controlled oscillation circuit, 10...Synchronization signal generation circuit, 11...Camera circuit , A...adapter,
B...Video camera, C...Coaxial cable.
Claims (1)
よりアダプタとビデオカメラとを接続するビデオ
カメラシステムに於て、 前記ビデオカメラ側に、供給電圧に応じて発振
周波数を変化せしめる第１可変発振回路と、該第
１可変発振回路を分周して同期信号を形成する同
期信号発生回路と、前記同期信号に同期して映像
信号を導出するカメラ回路とを配し、 前記アダプタ側に、前記映像信号より同期分離
パルスを導出する同期分離回路と、前記同期分離
パルスの周期に基づいて周期検出出力を発する周
期検出回路と、前記周期検出出力に基づきスイツ
チング信号の周波数を可変する第１可変発振回路
と、前記スイツチング信号に基づいて前記カメラ
に供給する直流電圧レベルを変更するＤＣ―ＤＣ
コンバータとを配することを特徴とする供給電圧
制御回路。[Scope of Utility Model Registration Claim] In a video camera system that connects an adapter and a video camera by a cable that serves as both a signal line and a power supply line, the oscillation frequency is changed on the video camera side according to the supply voltage. A first variable oscillation circuit, a synchronization signal generation circuit that divides the frequency of the first variable oscillation circuit to form a synchronization signal, and a camera circuit that derives a video signal in synchronization with the synchronization signal, and the adapter On the side, a sync separation circuit that derives a sync separation pulse from the video signal, a period detection circuit that issues a period detection output based on the period of the sync separation pulse, and a frequency detection circuit that varies the frequency of the switching signal based on the period detection output. a first variable oscillation circuit; and a DC-DC circuit that changes the DC voltage level supplied to the camera based on the switching signal.
A supply voltage control circuit characterized by comprising a converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985150105U JPH0419898Y2 (en) | 1985-10-01 | 1985-10-01 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985150105U JPH0419898Y2 (en) | 1985-10-01 | 1985-10-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6258970U true JPS6258970U (en) | 1987-04-11 |
| JPH0419898Y2 JPH0419898Y2 (en) | 1992-05-07 |
Family
ID=31065937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985150105U Expired JPH0419898Y2 (en) | 1985-10-01 | 1985-10-01 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0419898Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60150856U (en) * | 1984-03-17 | 1985-10-07 | キヤノン株式会社 | Imaging device adapter |
-
1985
- 1985-10-01 JP JP1985150105U patent/JPH0419898Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60150856U (en) * | 1984-03-17 | 1985-10-07 | キヤノン株式会社 | Imaging device adapter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0419898Y2 (en) | 1992-05-07 |