JPS633635U - - Google Patents
Info
- Publication number
- JPS633635U JPS633635U JP9680786U JP9680786U JPS633635U JP S633635 U JPS633635 U JP S633635U JP 9680786 U JP9680786 U JP 9680786U JP 9680786 U JP9680786 U JP 9680786U JP S633635 U JPS633635 U JP S633635U
- Authority
- JP
- Japan
- Prior art keywords
- limiter
- filter
- television tuner
- luminance signal
- demodulated
- 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
- 239000000284 extract Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 1
Landscapes
- Picture Signal Circuits (AREA)
- Noise Elimination (AREA)
Description
第１図は本考案の一実施例を示すブロツク図、
第２図は本考案の他の実施例を示すブロツク図、
第３図は従来例を示すブロツク図である。
１……ハイパスフイルター、３……減算器、１
１……テレビチユーナ、１２……アンテナ入力電
圧検出回路、１３……リミツタレベル制御回路、
１４……可変リミツタ、１４ａ，１４ｂ……リミ
ツタ、１５……切換スイツチ。
FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a block diagram showing another embodiment of the present invention;
FIG. 3 is a block diagram showing a conventional example. 1...High pass filter, 3...Subtractor, 1
1... Television tuner, 12... Antenna input voltage detection circuit, 13... Limiter level control circuit,
14... Variable limiter, 14a, 14b... Limiter, 15... Changeover switch.
Claims (1)
含まれるノイズ成分を取り出すフイルターと、 前記フイルターで取り出されたノイズ成分の振
幅を所定のリミツタレベルによつて制限するリミ
ツタと、 アンテナ入力電圧の大きさに応じて前記リミツ
タのリミツタレベルを制御するリミツタレベル制
御回路と、 テレビチユーナの復調輝度信号から前記リミツ
タの出力信号を減算する減算回路とを備えたこと
を特徴とするノイズ除去回路。[Claims for Utility Model Registration] A filter that extracts noise components contained in a luminance signal demodulated by a television tuner, a limiter that limits the amplitude of the noise components extracted by the filter to a predetermined limiter level, and an antenna. A noise removal circuit comprising: a limiter level control circuit that controls a limiter level of the limiter according to the magnitude of an input voltage; and a subtraction circuit that subtracts the output signal of the limiter from a demodulated luminance signal of a television tuner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9680786U JPS633635U (en) | 1986-06-26 | 1986-06-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9680786U JPS633635U (en) | 1986-06-26 | 1986-06-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS633635U true JPS633635U (en) | 1988-01-11 |
Family
ID=30962994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9680786U Pending JPS633635U (en) | 1986-06-26 | 1986-06-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS633635U (en) |
-
1986
- 1986-06-26 JP JP9680786U patent/JPS633635U/ja active Pending
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