JPS6448989U - - Google Patents
Info
- Publication number
- JPS6448989U JPS6448989U JP14360687U JP14360687U JPS6448989U JP S6448989 U JPS6448989 U JP S6448989U JP 14360687 U JP14360687 U JP 14360687U JP 14360687 U JP14360687 U JP 14360687U JP S6448989 U JPS6448989 U JP S6448989U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- chroma
- outputs
- amplifier
- gain
- 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 3
- 230000007423 decrease Effects 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 7
Description
図面はこの考案の記録クロマ電流制御回路の実
施例を示し、第１図は第１の実施例のブロツク図
、第２図、第３図は第１図の一部の詳細な結線図
、記録クロマ電流の特性図、第４図は第２の実施
例のブロツク図、第５図、第６図は第４図の一部
の詳細な結線図、記録クロマ電流の特性図、第７
図は第３の実施例のブロツク図である。
６……利得可変型増幅器、７，７′……検波回
路。
The drawings show an embodiment of the recording chroma current control circuit of this invention. FIG. 1 is a block diagram of the first embodiment, and FIGS. 2 and 3 are detailed wiring diagrams of a part of FIG. A characteristic diagram of the chroma current, FIG. 4 is a block diagram of the second embodiment, FIGS. 5 and 6 are detailed connection diagrams of a part of FIG. 4, a characteristic diagram of the recording chroma current,
The figure is a block diagram of the third embodiment. 6...variable gain amplifier, 7,7'...detection circuit.
Claims (1)
れ、記録ビデオ信号中のカラーバースト信号を含
むクロマ信号を増幅して出力する記録クロマ電流
制御回路において、 利得制御信号のレベルに比例して利得が可変さ
れ、前記クロマ信号を増幅して出力する利得可変
型増幅器と、 前記増幅器の出力信号または入力信号を平均検
波処理し、入力信号または出力信号のレベルが大
きくなる程変化率が減少する特性で前記利得制御
信号を形成して前記増幅器に出力する検波回路と を備えた記録クロマ電流制御回路。[Claim for Utility Model Registration] In a recording chroma current control circuit that is provided in a chroma recording section of a video tape recorder and amplifies and outputs a chroma signal including a color burst signal in a recorded video signal, A variable gain amplifier whose gain is proportionally varied and amplifies and outputs the chroma signal; and an average detection process is performed on the output signal or input signal of the amplifier, and the rate of change increases as the level of the input signal or output signal increases. a detection circuit that forms the gain control signal with a characteristic that the gain control signal decreases and outputs it to the amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14360687U JPS6448989U (en) | 1987-09-19 | 1987-09-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14360687U JPS6448989U (en) | 1987-09-19 | 1987-09-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6448989U true JPS6448989U (en) | 1989-03-27 |
Family
ID=31410575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14360687U Pending JPS6448989U (en) | 1987-09-19 | 1987-09-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6448989U (en) |
-
1987
- 1987-09-19 JP JP14360687U patent/JPS6448989U/ja active Pending
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