JPH0293872U - - Google Patents
Info
- Publication number
- JPH0293872U JPH0293872U JP116689U JP116689U JPH0293872U JP H0293872 U JPH0293872 U JP H0293872U JP 116689 U JP116689 U JP 116689U JP 116689 U JP116689 U JP 116689U JP H0293872 U JPH0293872 U JP H0293872U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- video
- variable
- amplification circuit
- 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
- 230000003321 amplification Effects 0.000 claims description 5
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims 3
- 238000010586 diagram Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 1
Landscapes
- Picture Signal Circuits (AREA)
Description
第１図はこの考案の一実施例によるテレビ受像
機を示すブロツク図、第２図はこの考案の一実施
例による映像増幅回路の回路図、第３図は入力レ
ベルに対する利得を示すグラフ図、第４図は周波
数に対する利得を示すグラフ図、第５図は従来の
テレビ受像機を示すブロツク図である。
３は映像増幅回路、８は直流変換回路、４０は
周波数特性可変回路。尚、図中、同一符号は同一
、又は相当部分を示す。
FIG. 1 is a block diagram showing a television receiver according to an embodiment of this invention, FIG. 2 is a circuit diagram of a video amplification circuit according to an embodiment of this invention, and FIG. 3 is a graph showing gain with respect to input level. FIG. 4 is a graph showing gain versus frequency, and FIG. 5 is a block diagram showing a conventional television receiver. 3 is a video amplification circuit, 8 is a DC conversion circuit, and 40 is a variable frequency characteristic circuit. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.
Claims (1)
示される映像のコントラストを調整するようにし
たテレビ受像機において、上記映像増幅回路の周
波数特性を可変とする周波数特性可変回路と、上
記映像増幅回路に入力される映像信号のレベルを
検出する映像レベル検出回路とを設け、上記映像
レベル検出回路の検出信号により、上記映像増幅
回路の利得と上記周波数特性可変回路とを制御す
るようにしたことを特徴とするテレビ受像機。 In a television receiver that adjusts the contrast of a displayed image by controlling the gain of the video amplification circuit, a variable frequency characteristic circuit that makes the frequency characteristics of the video amplification circuit variable; A video level detection circuit that detects the level of an input video signal is provided, and the gain of the video amplification circuit and the frequency characteristic variable circuit are controlled by the detection signal of the video level detection circuit. TV receiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP116689U JPH0293872U (en) | 1989-01-11 | 1989-01-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP116689U JPH0293872U (en) | 1989-01-11 | 1989-01-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0293872U true JPH0293872U (en) | 1990-07-25 |
Family
ID=31200820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP116689U Pending JPH0293872U (en) | 1989-01-11 | 1989-01-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0293872U (en) |
-
1989
- 1989-01-11 JP JP116689U patent/JPH0293872U/ja active Pending