JPH0221865U - - Google Patents
Info
- Publication number
- JPH0221865U JPH0221865U JP1988099965U JP9996588U JPH0221865U JP H0221865 U JPH0221865 U JP H0221865U JP 1988099965 U JP1988099965 U JP 1988099965U JP 9996588 U JP9996588 U JP 9996588U JP H0221865 U JPH0221865 U JP H0221865U
- Authority
- JP
- Japan
- Prior art keywords
- section
- signal
- photocoupler
- control signal
- output
- 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
- 230000003321 amplification Effects 0.000 claims 5
- 238000003199 nucleic acid amplification method Methods 0.000 claims 5
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Picture Signal Circuits (AREA)
Description
第１図は本考案による映像信号補償回路図であ
る。
図中、１，２，５……増幅部、３……制御信号
発生部、４……スイツチング部、６，８……ホト
カプラ、７……出力増幅部、９……負帰還部。
FIG. 1 is a diagram of a video signal compensation circuit according to the present invention. In the figure, 1, 2, 5...amplifying section, 3...control signal generating section, 4...switching section, 6, 8...photocoupler, 7...output amplifying section, 9...negative feedback section.
Claims (1)
ビデオテープレコーダー映像信号を増幅する増幅
部２と、テレビジヨン／ビデオテープレコーダー
信号により制御信号を発生する制御信号発生部３
と、該制御信号発生部３から発生された制御信号
により前記増幅部１，２の出力信号中の一つを選
択して出力するスイツチング部４と、該スイツチ
ング部４の出力信号を増幅する増幅部５と、該増
幅部５の出力信号に比例した信号を発生して出力
するホトカプラ６と、該ホトカプラ６の出力信号
を増幅して出力する出力増幅部７と、前記制御信
号発生部３から発生する制御信号によりオン又は
オフされるホトカプラ８と、前記出力増幅部７の
トランジスターＱ６のエミツタに出力された信号
を前記ホトカプラ８のオン又はオフにより可変し
て前記ホトカプラ６の受光トランジスターＰＴ１
のベースに負帰還させる負帰還部９とにより構成
されたことを特徴とする、テレビジヨンおよびビ
デオテープレコーダーの映像信号補償回路。 an amplifying section 1 that amplifies a television video signal;
An amplifying section 2 that amplifies the video tape recorder video signal, and a control signal generating section 3 that generates a control signal based on the television/video tape recorder signal.
, a switching section 4 that selects and outputs one of the output signals of the amplification sections 1 and 2 based on the control signal generated from the control signal generation section 3, and an amplification section that amplifies the output signal of the switching section 4. 5, a photocoupler 6 that generates and outputs a signal proportional to the output signal of the amplification section 5, an output amplification section 7 that amplifies and outputs the output signal of the photocoupler 6, and a control signal generation section 3. A photocoupler 8 is turned on or off by the generated control signal, and a photodetector transistor PT1 of the photocoupler 6 is changed by changing the signal outputted to the emitter of the transistor Q6 of the output amplification section 7 by turning the photocoupler 8 on or off .
1. A video signal compensation circuit for televisions and video tape recorders, comprising a negative feedback section 9 that provides negative feedback to the base of the video signal compensation circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988099965U JPH0715241Y2 (en) | 1988-07-29 | 1988-07-29 | Video signal compensation circuit for television and video tape recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988099965U JPH0715241Y2 (en) | 1988-07-29 | 1988-07-29 | Video signal compensation circuit for television and video tape recorder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0221865U true JPH0221865U (en) | 1990-02-14 |
| JPH0715241Y2 JPH0715241Y2 (en) | 1995-04-10 |
Family
ID=31327608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988099965U Expired - Lifetime JPH0715241Y2 (en) | 1988-07-29 | 1988-07-29 | Video signal compensation circuit for television and video tape recorder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0715241Y2 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5515859U (en) * | 1978-07-17 | 1980-01-31 | ||
| JPS5746592A (en) * | 1980-09-03 | 1982-03-17 | Hitachi Ltd | Color solid image pickup device |
| JPS6224779A (en) * | 1985-07-25 | 1987-02-02 | Sony Corp | Luminance signal band switching circuit for television receiver |
| JPS62234485A (en) * | 1986-03-24 | 1987-10-14 | Nec Home Electronics Ltd | Color television receiver with exclusive video input terminal |
-
1988
- 1988-07-29 JP JP1988099965U patent/JPH0715241Y2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5515859U (en) * | 1978-07-17 | 1980-01-31 | ||
| JPS5746592A (en) * | 1980-09-03 | 1982-03-17 | Hitachi Ltd | Color solid image pickup device |
| JPS6224779A (en) * | 1985-07-25 | 1987-02-02 | Sony Corp | Luminance signal band switching circuit for television receiver |
| JPS62234485A (en) * | 1986-03-24 | 1987-10-14 | Nec Home Electronics Ltd | Color television receiver with exclusive video input terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0715241Y2 (en) | 1995-04-10 |