JPH042190U - - Google Patents
Info
- Publication number
- JPH042190U JPH042190U JP4280590U JP4280590U JPH042190U JP H042190 U JPH042190 U JP H042190U JP 4280590 U JP4280590 U JP 4280590U JP 4280590 U JP4280590 U JP 4280590U JP H042190 U JPH042190 U JP H042190U
- Authority
- JP
- Japan
- Prior art keywords
- blanking
- collector
- complementary transistor
- video amplifier
- direct
- 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
- 230000000295 complement effect Effects 0.000 claims description 5
- 230000006866 deterioration Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Landscapes
- Processing Of Color Television Signals (AREA)
Description
第１図は本考案の一実施例を示すブランキング
混合回路図、第２図は同第１図の動作波形図、第
３図は従来のブランキング混合回路図である。
１は広帯域映像増幅器、２は広帯域増幅器１と
コンプリメンタリのブランキング信号混合用増幅
器、６はブランキングレベル調整用可変抵抗、１
３はＣＲＴドライブ回路、１４は入力映像信号、
Ａは広帯域映像増幅回路出力の映像信号、Ｂは入
力ブランキング信号、Ｃはブランキング信号が混
合された映像信号である。
FIG. 1 is a blanking mixing circuit diagram showing an embodiment of the present invention, FIG. 2 is an operation waveform diagram of FIG. 1, and FIG. 3 is a conventional blanking mixing circuit diagram. 1 is a wideband video amplifier, 2 is a blanking signal mixing amplifier complementary to wideband amplifier 1, 6 is a variable resistor for adjusting the blanking level, 1
3 is a CRT drive circuit, 14 is an input video signal,
A is a video signal output from the wideband video amplification circuit, B is an input blanking signal, and C is a video signal mixed with the blanking signal.
Claims (1)
幅器において、周囲温度変化等におけるコレクタ
遮断電流ＩＣＢ０の変化による前記直結形広帯域
映像増幅器のバイアス変動を低減するために、前
記直結形広帯域映像増幅器のコレクタとコンプリ
メンタリ形トランジスタのコレクタとを接続して
ブランキング付加回路を構成し、前記コンプリメ
ンタリ形トランジスタのベース端子にブランキン
グ信号を加え、広帯域映像信号にブランキング信
号を混合したことを特徴とするブランキング混合
回路。 (2) 前記コンプリメンタリ形トランジスタの出
力容量Ｃｏｂによつて前記広帯域映像増幅器の周
波数特性が劣化するのを低減するために、抵抗器
を介して前記コンプリメンタリ形トランジスタの
コレクタを接続し、前記抵抗器を可変することに
よつて混合したブランキングのレベル調整をおこ
なうことを特徴とする請求項(1)記載のブランキ
ング混合回路。[Claims for Utility Model Registration] (1) In a direct-coupled wideband video amplifier that drives a cathode ray tube, etc., to reduce bias fluctuations in the direct-coupled wideband video amplifier due to changes in the collector cut-off current ICB 0 due to changes in ambient temperature, etc. A blanking addition circuit is configured by connecting the collector of the direct-coupled wideband video amplifier and the collector of the complementary transistor, and a blanking signal is applied to the base terminal of the complementary transistor to add the blanking signal to the wideband video signal. A blanking mixing circuit characterized by mixing the following. (2) In order to reduce deterioration of the frequency characteristics of the broadband video amplifier due to the output capacitance C ob of the complementary transistor, the collector of the complementary transistor is connected via a resistor, and the resistor 2. The blanking mixing circuit according to claim 1, wherein the level of the mixed blanking is adjusted by varying the blanking mixing circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4280590U JPH042190U (en) | 1990-04-20 | 1990-04-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4280590U JPH042190U (en) | 1990-04-20 | 1990-04-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH042190U true JPH042190U (en) | 1992-01-09 |
Family
ID=31554666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4280590U Pending JPH042190U (en) | 1990-04-20 | 1990-04-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH042190U (en) |
-
1990
- 1990-04-20 JP JP4280590U patent/JPH042190U/ja active Pending
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