JPH0439719U - - Google Patents
Info
- Publication number
- JPH0439719U JPH0439719U JP1990082243U JP8224390U JPH0439719U JP H0439719 U JPH0439719 U JP H0439719U JP 1990082243 U JP1990082243 U JP 1990082243U JP 8224390 U JP8224390 U JP 8224390U JP H0439719 U JPH0439719 U JP H0439719U
- Authority
- JP
- Japan
- Prior art keywords
- intermediate frequency
- frequency amplification
- printed wiring
- video intermediate
- wiring board
- 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 10
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims 4
- 238000010586 diagram Methods 0.000 description 2
- 238000010897 surface acoustic wave method Methods 0.000 description 2
Landscapes
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Amplifiers (AREA)
Description
第1図は本考案に係る映像中間周波増幅装置の
一実施例を示す分解斜視図、第2図は第1図のシ
ールド板が取付けられた状態のSAWフイルタの
斜視図、第3図は第2図のSAWフイルタの底面
図、第4図は第2図のSAWフイルタの側面図、
第5図は第1図の映像中間周波増幅装置を組立て
た状態を示す斜視図、第6図は第5図の映像中間
周波増幅装置の平面図、第7図は第5図の映像中
間周波増幅装置の底面図、第8図は第7図の表面
弾性波付近を拡大して示す拡大図、第9図は第6
図のB−B線断面図、第10図は第1図の実施例
の用いられるIF回路を示す構成図、第11図は
第10図のIF回路の選択度特性を示すグラフ、
第12図は従来のテレビジヨン受像機のIF回路
を示す構成図、第13図は第12図のIF回路の
IF選択特性を説明するグラフ、第14図は第1
3図の部分Aの拡大図である。
100……映像中間周波増幅装置、11……S
AWフイルタ、12……印刷配線板、14……シ
ヤーシ本体、33,34,35……区画、36,
37……内シールド板。
FIG. 1 is an exploded perspective view showing an embodiment of the video intermediate frequency amplification device according to the present invention, FIG. 2 is a perspective view of the SAW filter with the shield plate shown in FIG. 1 attached, and FIG. Figure 2 is a bottom view of the SAW filter, Figure 4 is a side view of the SAW filter in Figure 2,
5 is a perspective view showing the assembled state of the video intermediate frequency amplification device of FIG. 1, FIG. 6 is a plan view of the video intermediate frequency amplification device of FIG. 5, and FIG. 7 is a perspective view of the video intermediate frequency amplification device of FIG. 5. The bottom view of the amplification device, Figure 8 is an enlarged view showing the vicinity of the surface acoustic wave in Figure 7, and Figure 9 is an enlarged view of the vicinity of the surface acoustic wave in Figure 6.
10 is a configuration diagram showing the IF circuit used in the embodiment of FIG. 1, FIG. 11 is a graph showing the selectivity characteristics of the IF circuit of FIG. 10,
FIG. 12 is a block diagram showing the IF circuit of a conventional television receiver, FIG. 13 is a graph explaining the IF selection characteristics of the IF circuit of FIG. 12, and FIG.
FIG. 3 is an enlarged view of part A in FIG. 3; 100...Video intermediate frequency amplification device, 11...S
AW filter, 12...Printed wiring board, 14...Chassis body, 33, 34, 35...Division, 36,
37... Inner shield plate.
Claims (1)
方の面に回路パターン及びアースパターンが形成
される印刷配線板であつて、前記映像中間周波増
幅回路が、フイルタ回路部と、このフイルタ回路
部の入力側回路部と、該フイルタ回路部の出力側
回路部とに区画して構成された印刷配線板と、 この印刷配線板を収納する枠状の金属筐体であ
つて、該金属筐体の内側に上記の区画部分に対応
するようにして内シールド板を設け、この内シー
ルド板と前記金属筐体の少なくとも一方を前記印
刷配線板の前記アースパターンに電気的に接続し
た金属筐体とを具備したことを特徴とする映像中
間周波増幅装置。[Claims for Utility Model Registration] A printed wiring board in which a video intermediate frequency amplification circuit is constructed on a board, and a circuit pattern and a ground pattern are formed on one surface, the video intermediate frequency amplification circuit being a filter circuit. a printed wiring board divided into a section, an input side circuit section of the filter circuit section, and an output side circuit section of the filter circuit section; and a frame-shaped metal casing for housing the printed wiring board. An inner shield plate is provided inside the metal casing so as to correspond to the partitioned portion, and at least one of the inner shield plate and the metal casing is electrically connected to the ground pattern of the printed wiring board. A video intermediate frequency amplification device comprising: a metal casing connected to a video intermediate frequency amplification device;
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1990082243U JPH0439719U (en) | 1990-07-31 | 1990-07-31 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1990082243U JPH0439719U (en) | 1990-07-31 | 1990-07-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0439719U true JPH0439719U (en) | 1992-04-03 |
Family
ID=31628880
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1990082243U Pending JPH0439719U (en) | 1990-07-31 | 1990-07-31 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0439719U (en) |
-
1990
- 1990-07-31 JP JP1990082243U patent/JPH0439719U/ja active Pending