JPH01171186U - - Google Patents
Info
- Publication number
- JPH01171186U JPH01171186U JP6290088U JP6290088U JPH01171186U JP H01171186 U JPH01171186 U JP H01171186U JP 6290088 U JP6290088 U JP 6290088U JP 6290088 U JP6290088 U JP 6290088U JP H01171186 U JPH01171186 U JP H01171186U
- Authority
- JP
- Japan
- Prior art keywords
- phase
- variable device
- phase variable
- oscillation
- video tape
- 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 7
- 238000010586 diagram Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 1
Description
第１図はこの考案のビデオテープレコーダ用発
振回路の実施例を示すブロツク図、第２図は従来
のビデオテープレコーダ用発振回路を示すブロツ
ク図である。
２……水晶発振子（位相制御型発振子）、４…
…増幅器、６……位相可変器、８……バツフア回
路、１０……スイツチ。
FIG. 1 is a block diagram showing an embodiment of the oscillation circuit for a video tape recorder of this invention, and FIG. 2 is a block diagram showing a conventional oscillation circuit for a video tape recorder. 2...Crystal oscillator (phase controlled oscillator), 4...
...Amplifier, 6...Phase variable device, 8...Buffer circuit, 10...Switch.
Claims (1)
位相可変器と、この位相可変器の位相出力によつ
て制御される位相制御型発振子を付加した増幅器
とを備えて前記位相可変器の位相特性に応じた周
波数を発振するビデオテープレコーダ用発振回路
において、 前記位相可変器に対してバツフア回路を併設す
るとともに、前記増幅器に対して前記位相可変器
を接続する記録時の発振ループと、前記位相可変
器に代えて前記バツフア回路を接続する再生時の
発振ループとを選択するスイツチを設置して選択
可能にし、記録時と再生時の発振ループを別系統
にしたことを特徴とするビデオテープレコーダ用
発振回路。[Claims for Utility Model Registration] A phase variable device whose input/output phase characteristics change according to a control input, and an amplifier equipped with a phase-controlled oscillator that is controlled by the phase output of this phase variable device. In the oscillation circuit for a video tape recorder that oscillates a frequency according to the phase characteristic of the phase variable device, a buffer circuit is provided for the phase variable device, and the phase variable device is connected to the amplifier. A switch is installed to select between an oscillation loop during recording and an oscillation loop during playback to which the buffer circuit is connected instead of the phase variable device, and the oscillation loops during recording and playback are separated into systems. An oscillation circuit for a video tape recorder, characterized by the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6290088U JPH01171186U (en) | 1988-05-13 | 1988-05-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6290088U JPH01171186U (en) | 1988-05-13 | 1988-05-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01171186U true JPH01171186U (en) | 1989-12-04 |
Family
ID=31288445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6290088U Pending JPH01171186U (en) | 1988-05-13 | 1988-05-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01171186U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5635589A (en) * | 1979-08-31 | 1981-04-08 | Toshiba Corp | Color signal recording/reproducing circuit |
-
1988
- 1988-05-13 JP JP6290088U patent/JPH01171186U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5635589A (en) * | 1979-08-31 | 1981-04-08 | Toshiba Corp | Color signal recording/reproducing circuit |
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