JPS6352355U - - Google Patents
Info
- Publication number
- JPS6352355U JPS6352355U JP14580686U JP14580686U JPS6352355U JP S6352355 U JPS6352355 U JP S6352355U JP 14580686 U JP14580686 U JP 14580686U JP 14580686 U JP14580686 U JP 14580686U JP S6352355 U JPS6352355 U JP S6352355U
- Authority
- JP
- Japan
- Prior art keywords
- screen display
- signal
- circuit
- output means
- electric field
- 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
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 4
- 230000003321 amplification Effects 0.000 claims description 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 2
- 230000005684 electric field Effects 0.000 claims 3
- 238000010586 diagram Methods 0.000 description 5
Description
第１図は本考案の画面表示装置の一実施例を示
すブロツク図、第２図は第１図の装置の要部回路
を具体的に示す回路図、第３図は従来の画面表示
装置を示すブロツク図、第４図は第３図の装置の
回路の一部を具体的に示す回路図である。
１……オンスクリーン信号発生回路、２……ス
イツチ、３……周波数帯域制限回路、５……ビデ
オドライブ回路、６……中間周波数増幅回路、８
……判別回路、９……ビデオ出力回路、１０……
ブラウン管。
Fig. 1 is a block diagram showing one embodiment of the screen display device of the present invention, Fig. 2 is a circuit diagram specifically showing the main circuit of the device shown in Fig. 1, and Fig. 3 is a diagram showing a conventional screen display device. The block diagram shown in FIG. 4 is a circuit diagram specifically showing a part of the circuit of the apparatus shown in FIG. DESCRIPTION OF SYMBOLS 1... On-screen signal generation circuit, 2... Switch, 3... Frequency band limiting circuit, 5... Video drive circuit, 6... Intermediate frequency amplification circuit, 8
...Discrimination circuit, 9...Video output circuit, 10...
Braun tube.
Claims (1)
示用信号発生回路と、 この画面表示用信号発生回路からの画面表示用
信号をアンテナ入力されたビデオ信号に加えて受
像管に出力する信号出力手段と、 中間周波数増幅回路から取り出した自動利得制
御電圧がアンテナ入力の弱電界に相当した一定レ
ベル以上かどうかを判別し、その判別信号を出力
する判別回路と、 前記画面表示用信号発生回路と前記信号出力手
段との間に設けられ、前記判別信号によつて切り
換えられる切換手段であつて、アンテナ入力が弱
電界時には前記画面表示用信号をそのスプリアス
帯域を制限する回路を通して前記信号出力手段に
供給し、中・高電界時には前記画面表示用信号を
そのまま前記信号出力手段に供給する切換手段と
を具備したことを特徴とする画面表示装置。[Claims for Utility Model Registration] A screen display signal generation circuit that generates screen display signals for characters and symbols, and a screen display signal from this screen display signal generation circuit that is added to the video signal input to the antenna. a signal output means for outputting to the picture tube; a discrimination circuit for discriminating whether the automatic gain control voltage extracted from the intermediate frequency amplification circuit is equal to or higher than a certain level corresponding to the weak electric field of the antenna input, and outputting the discrimination signal; A switching means provided between the screen display signal generation circuit and the signal output means and switched by the discrimination signal, which limits the spurious band of the screen display signal when the antenna input is a weak electric field. A screen display device comprising: switching means for supplying the signal to the signal output means through a circuit, and for supplying the screen display signal as it is to the signal output means when the electric field is medium or high.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14580686U JPS6352355U (en) | 1986-09-25 | 1986-09-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14580686U JPS6352355U (en) | 1986-09-25 | 1986-09-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6352355U true JPS6352355U (en) | 1988-04-08 |
Family
ID=31057678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14580686U Pending JPS6352355U (en) | 1986-09-25 | 1986-09-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6352355U (en) |
-
1986
- 1986-09-25 JP JP14580686U patent/JPS6352355U/ja active Pending
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