JPH0292268U - - Google Patents
Info
- Publication number
- JPH0292268U JPH0292268U JP17099588U JP17099588U JPH0292268U JP H0292268 U JPH0292268 U JP H0292268U JP 17099588 U JP17099588 U JP 17099588U JP 17099588 U JP17099588 U JP 17099588U JP H0292268 U JPH0292268 U JP H0292268U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- coring
- pass filter
- level signal
- 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 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
Description
第１図は本考案に係るノイズリダクシヨン回路
の一実施例を示すブロツク図、第２図は電界強度
に対するＡＧＣ信号の出力レベルの関係を示す特
性図、第３図は従来のノイズリダクシヨン回路を
示すブロツク図である。
１……ハイパスフイルタ、３……コアリング回
路、５……ローパスフイルタ、７……低域増幅回
路、９……高域増幅回路、１１……加算回路、１
３……増幅回路、１５……制御回路、１７……デ
コーダ、１９……切換回路、２１……ＡＧＣ信号
増幅回路、２３……インバータ、２５……コアリ
ングレベル信号供給回路、Ｃ１，Ｃ２……コンデ
ンサ、Ｒ１〜Ｒ４……抵抗、ＶＲ１，ＶＲ２……
可変抵抗。
Fig. 1 is a block diagram showing an embodiment of the noise reduction circuit according to the present invention, Fig. 2 is a characteristic diagram showing the relationship between the output level of the AGC signal and the electric field strength, and Fig. 3 is a conventional noise reduction circuit. FIG. 1...High pass filter, 3...Coring circuit, 5...Low pass filter, 7...Low frequency amplifier circuit, 9...High frequency amplifier circuit, 11...Addition circuit, 1
3...Amplification circuit, 15...Control circuit, 17...Decoder, 19...Switching circuit, 21...AGC signal amplification circuit, 23...Inverter, 25...Coring level signal supply circuit, C1 , C 2 ...Capacitor, R1 to R4 ...Resistor, VR1 , VR2 ...
Variable resistance.
Claims (1)
イルタと、 このハイパスフイルタからの出力信号中からコ
アリングレベル信号より低いレベルの信号成分を
除去するコアリング回路と、 前記映像信号に係る中間周波段へのＡＧＣ信号
に基づき前記コアリングレベル信号を形成して前
記コアリング回路へ供給するコアリングレベル信
号供給回路と、 を具備してなることを特徴とするノイズリダクシ
ヨン回路。[Claims for Utility Model Registration] A high-pass filter that passes high-frequency components in a video signal; a coring circuit that removes signal components at a level lower than a coring level signal from an output signal from the high-pass filter; A coring level signal supply circuit that forms the coring level signal based on an AGC signal to an intermediate frequency stage related to a video signal and supplies the coring level signal to the coring circuit. circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17099588U JPH0292268U (en) | 1988-12-31 | 1988-12-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17099588U JPH0292268U (en) | 1988-12-31 | 1988-12-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0292268U true JPH0292268U (en) | 1990-07-23 |
Family
ID=31462425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17099588U Pending JPH0292268U (en) | 1988-12-31 | 1988-12-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0292268U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003107659A1 (en) * | 2002-06-13 | 2003-12-24 | 松下電器産業株式会社 | Noise reduction device and noise reduction method |
| GB2416639A (en) * | 2002-06-13 | 2006-02-01 | Matsushita Electric Ind Co Ltd | Reducing noise in an amplified video signal by splitting the signal into frequency bands |
-
1988
- 1988-12-31 JP JP17099588U patent/JPH0292268U/ja active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003107659A1 (en) * | 2002-06-13 | 2003-12-24 | 松下電器産業株式会社 | Noise reduction device and noise reduction method |
| GB2397963A (en) * | 2002-06-13 | 2004-08-04 | Matsushita Electric Ind Co Ltd | Noise Reduction Device And Noise Reduction Method |
| GB2416639A (en) * | 2002-06-13 | 2006-02-01 | Matsushita Electric Ind Co Ltd | Reducing noise in an amplified video signal by splitting the signal into frequency bands |
| GB2416639B (en) * | 2002-06-13 | 2006-09-06 | Matsushita Electric Ind Co Ltd | Noise reducing device and noise reducing method |
| GB2397963B (en) * | 2002-06-13 | 2006-09-06 | Matsushita Electric Ind Co Ltd | Noise reducing device and noise reducing method |
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