JPS61378U - Video amplification circuit for multi-system color television receivers - Google Patents
Video amplification circuit for multi-system color television receiversInfo
- Publication number
- JPS61378U JPS61378U JP8290484U JP8290484U JPS61378U JP S61378 U JPS61378 U JP S61378U JP 8290484 U JP8290484 U JP 8290484U JP 8290484 U JP8290484 U JP 8290484U JP S61378 U JPS61378 U JP S61378U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- amplification circuit
- impedance
- emitter
- system color
- 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
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は本考案に係る映像増幅回路の一例を示す回路図
、第２図は本考案により増幅される帯域幅の狭い信号の
周波数特性を示す特性図、第３図は同帯域幅の広い信号
の周波数特性を示す特性図、第４図は本考案の他の実施
例を示す回路−、第５図′は従来の映極増幅回路の一例
を示す回路図、第６図は従来回路により増幅される帯域
幅の狭い信号の周波数特性を示す特性図、第７図は同上
回路による帯域幅の広い信号の周波数特性を示す特性図
である。
１・・・入力端子、３・・・映像増幅用トランジスタ、
４， ９， １１， １４， １７， １９・
・・抵抗、訃・・出力端子、１０・・・コンデンサ、１
２・・・コイル、１５・・・切換電圧端子。Figure 1 is a circuit diagram showing an example of a video amplification circuit according to the present invention, Figure 2 is a characteristic diagram showing the frequency characteristics of a signal with a narrow bandwidth amplified by the present invention, and Figure 3 is a diagram showing the frequency characteristics of a signal with a wide bandwidth. A characteristic diagram showing the frequency characteristics of a signal, Fig. 4 is a circuit diagram showing another embodiment of the present invention, Fig. 5' is a circuit diagram showing an example of a conventional video pole amplifier circuit, and Fig. 6 is a circuit diagram showing a conventional circuit. FIG. 7 is a characteristic diagram showing the frequency characteristics of a narrow-bandwidth signal to be amplified, and FIG. 7 is a characteristic diagram showing the frequency characteristics of a wide-bandwidth signal by the same circuit. 1... Input terminal, 3... Video amplification transistor,
4, 9, 11, 14, 17, 19・
...Resistance, ...Output terminal, 10...Capacitor, 1
2...Coil, 15...Switching voltage terminal.
Claims (1)
号を選択的に受信することのできるマルチシステム拳カ
ラーテレビジョン受像機において、 第１または第２のテレビジョン信号から抽出された映像
信号成分がベースに供給される映像増幅用のトランジス
タと、このトランジスタのエミツタ側基準電圧端と同エ
ミツタとの間に直列に接続された第１および第２のイン
ピーダンス素子と、これらインピーダンス素子の接続点
に一端が接続された第３のインピーダンス素子と、この
第３のインピーダンス素子の他端に接続され、前記第１
および第２のテレビジョン信号の選択操作に応じて発生
する切換電圧で前記トランジスタのエミツタ側合成イン
ピーダンスを切り換えるようにしたスイッチング手段を
具備したことを特徴とするマルチシステム拳カラーテレ
ビジョン受像機の映像増幅回路。[Claims for Utility Model Registration] In a multi-system color television receiver capable of selectively receiving first and second television signals of different channel bands, the first or second television signal a transistor for video amplification whose base is supplied with a video signal component extracted from the transistor; first and second impedance elements connected in series between the reference voltage terminal on the emitter side of this transistor and the emitter; A third impedance element whose one end is connected to the connection point of these impedance elements, and a third impedance element whose other end is connected to the
and a switching means configured to switch the emitter-side composite impedance of the transistor using a switching voltage generated in response to a selection operation of a second television signal. Amplification circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8290484U JPS61378U (en) | 1984-06-06 | 1984-06-06 | Video amplification circuit for multi-system color television receivers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8290484U JPS61378U (en) | 1984-06-06 | 1984-06-06 | Video amplification circuit for multi-system color television receivers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61378U true JPS61378U (en) | 1986-01-06 |
Family
ID=30631046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8290484U Pending JPS61378U (en) | 1984-06-06 | 1984-06-06 | Video amplification circuit for multi-system color television receivers |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61378U (en) |
-
1984
- 1984-06-06 JP JP8290484U patent/JPS61378U/en active Pending
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