JPH01105270U - - Google Patents
Info
- Publication number
- JPH01105270U JPH01105270U JP20016587U JP20016587U JPH01105270U JP H01105270 U JPH01105270 U JP H01105270U JP 20016587 U JP20016587 U JP 20016587U JP 20016587 U JP20016587 U JP 20016587U JP H01105270 U JPH01105270 U JP H01105270U
- Authority
- JP
- Japan
- Prior art keywords
- video
- intermediate frequency
- frequency signal
- signal
- gain control
- 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 7
- 230000003321 amplification Effects 0.000 claims 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims 4
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Picture Signal Circuits (AREA)
Description
第１図は本考案による映像検波装置の一実施例
を示すブロツク図、第２図はその各部の信号波形
図、第３図は従来例を示すブロツク図、第４図は
その各部信号波形図である。
２，６……ＩＦアンプ、３，７……映像検波回
路、４……ＡＧＣ誤差検出回路、５……ＡＧＣル
ープフイルタ、８……ローパスフイルタ。
Fig. 1 is a block diagram showing an embodiment of the video detection device according to the present invention, Fig. 2 is a signal waveform diagram of each part thereof, Fig. 3 is a block diagram showing a conventional example, and Fig. 4 is a signal waveform diagram of each part thereof. It is. 2, 6... IF amplifier, 3, 7... Video detection circuit, 4... AGC error detection circuit, 5... AGC loop filter, 8... Low pass filter.
Claims (1)
、 この第１の増幅手段で増幅された映像中間周波
信号を検波する第１の検波手段と、 この第１の検波手段で検波された映像信号に応
じて上記第１の増幅手段に対する利得制御信号を
形成する自動利得制御手段と、 上記映像中間周波信号を増幅する第２の増幅手
段と、 この第２の増幅手段で増幅された映像中間周波
信号を検波して検波映像信号を出力する第２の検
波手段と、 上記自動利得制御手段からの利得制御信号の高
周波成分をカツトしてこれを上記第２の増幅手段
に利得制御信号として与えるローパスフイルタと
を備えたことを特徴とする映像検波装置。[Claims for Utility Model Registration] A first amplification means for amplifying a video intermediate frequency signal; a first detection means for detecting the video intermediate frequency signal amplified by the first amplification means; automatic gain control means for forming a gain control signal for the first amplification means according to the video signal detected by the detection means; a second amplification means for amplifying the video intermediate frequency signal; a second detection means for detecting the video intermediate frequency signal amplified by the means and outputting a detected video signal; A video detection device comprising: a low-pass filter for applying a gain control signal to the means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20016587U JPH01105270U (en) | 1987-12-30 | 1987-12-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20016587U JPH01105270U (en) | 1987-12-30 | 1987-12-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01105270U true JPH01105270U (en) | 1989-07-14 |
Family
ID=31490589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20016587U Pending JPH01105270U (en) | 1987-12-30 | 1987-12-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01105270U (en) |
-
1987
- 1987-12-30 JP JP20016587U patent/JPH01105270U/ja active Pending