JPH0257683U - - Google Patents
Info
- Publication number
- JPH0257683U JPH0257683U JP1988136893U JP13689388U JPH0257683U JP H0257683 U JPH0257683 U JP H0257683U JP 1988136893 U JP1988136893 U JP 1988136893U JP 13689388 U JP13689388 U JP 13689388U JP H0257683 U JPH0257683 U JP H0257683U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- video
- level control
- broadcasting
- television receiver
- 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 6
- 238000010586 diagram Methods 0.000 description 3
Description
第１図は、本考案の一実施例を示す回路図、第
２図は、従来のＣＡＴＶ用受信機を示す回路図、
及び第３図は第１図の説明に供する為の波形図で
ある。
２……ＶＩＦ増幅回路、３……検波回路、１１
……デイスクランブル回路、１２……レベルシフ
ト回路、１３……第２スイツチ、１４……ノイズ
除去回路。
FIG. 1 is a circuit diagram showing an embodiment of the present invention, FIG. 2 is a circuit diagram showing a conventional CATV receiver,
and FIG. 3 are waveform diagrams for explaining FIG. 1. 2...VIF amplifier circuit, 3...detection circuit, 11
... descramble circuit, 12 ... level shift circuit, 13 ... second switch, 14 ... noise removal circuit.
Claims (1)
映像信号及び、ＴＶ放送用の映像信号を検波する
映像検波回路と、 該映像検波回路の検波出力をレベル制御するレ
ベル制御回路と、 該レベル制御回路の出力信号をデイスクランブ
ルするデイスクランブル回路と、 前記レベル制御回路及び前記デイスクランブル
回路の出力信号を切換出力する選択回路と、 該選択回路の出力信号中のノイズを除去するノ
イズ除去回路と、 から成りＣＡＴＶ放送を受信可能としたことを
特徴とするテレビジヨン受像機。 (2) スクランブル変調されたＣＡＴＶ放送用の
映像信号及び、ＴＶ放送用の映像信号を増幅し、
前記映像検波回路に印加するＶＩＦ増幅回路と、 前記レベル制御回路又は前記デイスクランブル
回路の出力信号をピーク検波するピーク検波回路
と、 を備え、前記ピーク検波回路の出力信号に応じ
て前記ＶＩＦ増幅回路の利得を制御するようにし
たことを特徴とする請求項第(1)項記載のテレビ
ジヨン受像機。[Claims for Utility Model Registration] (1) A video detection circuit that detects a scramble-modulated video signal for CATV broadcasting and a video signal for TV broadcasting, and a level control that controls the level of the detection output of the video detection circuit. a descrambler circuit that descrambles the output signal of the level control circuit; a selection circuit that switches output signals of the level control circuit and the descrambler circuit; and a selection circuit that removes noise in the output signal of the selection circuit. What is claimed is: 1. A television receiver comprising: a noise removal circuit that performs a noise reduction circuit; (2) Amplify scramble-modulated video signals for CATV broadcasting and video signals for TV broadcasting,
a VIF amplifier circuit that applies voltage to the video detection circuit; and a peak detection circuit that peak-detects the output signal of the level control circuit or the descrambler circuit; 2. The television receiver according to claim 1, wherein the gain of the television receiver is controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988136893U JPH0257683U (en) | 1988-10-20 | 1988-10-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988136893U JPH0257683U (en) | 1988-10-20 | 1988-10-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0257683U true JPH0257683U (en) | 1990-04-25 |
Family
ID=31397826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988136893U Pending JPH0257683U (en) | 1988-10-20 | 1988-10-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0257683U (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60239189A (en) * | 1984-05-12 | 1985-11-28 | Kubota Ltd | Method for separating and identifying object |
| JPS6232788A (en) * | 1985-08-02 | 1987-02-12 | Sanyo Electric Co Ltd | Catv signal receiving converter equipment |
| JPS63117570A (en) * | 1986-10-30 | 1988-05-21 | ジェネラル インスツルメント コーポレイション | Dc coupling video clamp circuit |
-
1988
- 1988-10-20 JP JP1988136893U patent/JPH0257683U/ja active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60239189A (en) * | 1984-05-12 | 1985-11-28 | Kubota Ltd | Method for separating and identifying object |
| JPS6232788A (en) * | 1985-08-02 | 1987-02-12 | Sanyo Electric Co Ltd | Catv signal receiving converter equipment |
| JPS63117570A (en) * | 1986-10-30 | 1988-05-21 | ジェネラル インスツルメント コーポレイション | Dc coupling video clamp circuit |
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