JPH0410468U - - Google Patents
Info
- Publication number
- JPH0410468U JPH0410468U JP5057790U JP5057790U JPH0410468U JP H0410468 U JPH0410468 U JP H0410468U JP 5057790 U JP5057790 U JP 5057790U JP 5057790 U JP5057790 U JP 5057790U JP H0410468 U JPH0410468 U JP H0410468U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- resistor
- amplifier circuit
- amplifier
- switching
- 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 4
- 238000010586 diagram Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Landscapes
- Control Of Amplification And Gain Control (AREA)
- Picture Signal Circuits (AREA)
Description
第１図は本考案の映像出力回路の一実施例の構
成を示す回路図、第２図は本考案の映像出力回路
の他の実施例の構成を示す回路図、第３図は従来
の映像出力回路の一例の構成を示す回路図である
。
１……ビデオアンプ、４，５……ＮＰＮトラン
ジスタ（増幅回路）、１１，１２……抵抗、４１
……ｆ−ｖ変換および検出回路（検出回路）、４
２……ＮＰＮトランジスタ（スイツチング回路）
、４７……ＰＮＰトランジスタ（スイツチング回
路）。
FIG. 1 is a circuit diagram showing the configuration of one embodiment of the video output circuit of the present invention, FIG. 2 is a circuit diagram showing the configuration of another embodiment of the video output circuit of the present invention, and FIG. 3 is a circuit diagram showing the configuration of another embodiment of the video output circuit of the present invention. FIG. 2 is a circuit diagram showing the configuration of an example of an output circuit. 1... Video amplifier, 4, 5... NPN transistor (amplification circuit), 11, 12... Resistor, 41
... f-v conversion and detection circuit (detection circuit), 4
2...NPN transistor (switching circuit)
, 47...PNP transistor (switching circuit).
Claims (1)
、前記抵抗の前記増幅回路に対する接続を制御す
るスイツチング回路とを備えることを特徴とする
映像出力回路。[Claims for Utility Model Registration] An amplifier circuit that amplifies a video signal, a resistor that sets the bias of the amplifier circuit, a detection circuit that detects the frequency of a horizontal synchronization signal, and a switching circuit that responds to the output of the detection circuit. and a switching circuit that controls connection of the resistor to the amplifier circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5057790U JPH0410468U (en) | 1990-05-14 | 1990-05-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5057790U JPH0410468U (en) | 1990-05-14 | 1990-05-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0410468U true JPH0410468U (en) | 1992-01-29 |
Family
ID=31569242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5057790U Pending JPH0410468U (en) | 1990-05-14 | 1990-05-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0410468U (en) |
-
1990
- 1990-05-14 JP JP5057790U patent/JPH0410468U/ja active Pending